66th digit of Pi

What's the 66th digit of Pi?

Answer: The 66th digit of Pi after the decimal point is7
(Seven)

Discover the 66th digit of Pi

PositionDigits
1-100 1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679
101-200 8214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196
201-300 4428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273
301-400 7245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094
401-500 3305727036575959195309218611738193261179310511854807446237996274956735188575272489122793818301194912
501-600 9833673362440656643086021394946395224737190702179860943702770539217176293176752384674818467669405132
601-700 0005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235
701-800 4201995611212902196086403441815981362977477130996051870721134999999837297804995105973173281609631859
801-900 5024459455346908302642522308253344685035261931188171010003137838752886587533208381420617177669147303
901-1,000 5982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989
You can also download files with Pi digits here (TXT and ZIP, up to 1 billion digits)

Interesting facts about Pi

The sequence 6666666666 is the only 10+ digit single-digit number that is contained in the first billion digits of Pi. It appears at 386,980,412 position.


The sequence 999999 occurs in the first 1,000 digits of pi. Chance of this is less than 0.0995% (1 in 1,005)

It's also called Feynman Point: One of the most famous sequences within Pi occurs at the 762nd decimal place, where six consecutive nines appear. This sequence is known as the "Feynman Point" after physicist Richard Feynman, who jokingly claimed that he wanted to memorize the digits of Pi up to this point so he could recite them and end with "nine nine nine nine nine nine and so on," implying that Pi is rational.


March 14th (3/14) is celebrated worldwide as Pi Day because the date resembles the first three digits of Pi (3.14). Pi Day was officially recognized by the U.S. House of Representatives in 2009, and it's celebrated with pie eating, discussions about Pi, and even pi-reciting competitions.


Randomness in Pi: Although the digits of Pi appear random and no pattern has been discerned, Pi is used in random number generation and simulations, further highlighting its utility and intrigue in scientific and mathematical applications.


There are no occurrences of the sequence 123456 in the first 2 millions digits of Pi. It appears only at 2,458,885 position. Although, the probability of encountering any sequence of 6 characters in this segment is quite high.


Pi has a 12345 sequence in the first 50k digits. It appears at 49,702 position


Sequence 123456789 appears 2 times in the first billion digits of Pi.

What is Pi number?

Pi (π) is a fundamental mathematical constant representing the ratio of a circle's circumference to its diameter. This ratio remains constant for all circles, making pi an essential element in various fields of mathematics and science, especially in geometry, trigonometry, and calculus. Pi is an irrational number, meaning it cannot be expressed as a simple fraction, and it is also transcendental, indicating that it is not a root of any non-zero polynomial equation with rational coefficients.

The value of Pi is approximately 3.14159, but its decimal representation goes on infinitely without repeating, showcasing an endless, non-repeating sequence of digits beyond the decimal point. Due to its infinite nature, pi is usually approximated in calculations, with varying degrees of precision depending on the requirements of the specific application, such as 3.14, 22/7, or more precise decimal representations for more accurate calculations in scientific research and engineering projects. The study and computational quest to determine more digits of pi is a continuing effort in the mathematical community, symbolizing both the pursuit of knowledge and the limits of computational precision.

See Also

About "Pi Digit Explorer" Calculator

Pi Digit Explorer is an innovative online tool designed for enthusiasts of mathematics, educators, and the curious alike, offering an interactive way to explore the endless digits of pi (π), the mathematical constant that is fundamental to understanding circles. With Pi Digit Explorer, users can embark on a unique journey through the infinite sequence of pi's digits, which have fascinated mathematicians and enthusiasts for centuries.

For example, it can help you find out what's the 66th digit of Pi? (The answer is: 7).

Users can enter any position (e.g., the 66th digit) to instantly identify the corresponding digit of pi after the decimal point, within the confines of the first 100 million digits.

Whether you're a math teacher looking to inspire your students, a student working on a project about pi, or simply someone fascinated by the mysteries of mathematics, Pi Digit Explorer offers a portal to delve into the digits of pi like never before. Explore the digit that lies in the 69th position, delve into the depths of the first 10,000 digits, or set your sights on any number up to the 100 millionth digit. Every search is a step into the vast numerical universe of pi, limited only by your curiosity and the 100 million digit boundary.

Pi Digits Table

Digit PositionDigit
5
8
2
0
9
7
4
9
4
4
5
9
2
3
0
7
8
1
6
4
0
6
2
8
6
2
0
8
9
9

FAQ

What's the 66th digit of Pi?

The 66th digit of Pi after the decimal point is 7