667991

667,991 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 667991 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

667991 is a prime number. Like all primes (except two), it is an odd number.

Prime factorization of 667991:

667991

See below for interesting mathematical facts about the number 667991 from the Numbermatics database.

Names of 667991

Cardinal: 667991 can be written as Six hundred sixty-seven thousand, nine hundred ninety-one.

Scientific notation

Scientific notation: 6.67991 × 10⁵

Factors of 667991

Number of distinct prime factors ω(n): 1
Total number of prime factors Ω(n): 1
Sum of prime factors: 667991

Divisors of 667991

Number of divisors d(n): 2
Complete list of divisors:
1 667991
Sum of all divisors σ(n): 667992
Sum of proper divisors (its aliquot sum) s(n): 1
667991 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 667990

Bases of 667991

Binary: 10100011000101010111₂
Hexadecimal: 0xA3157
Base-36: EBFB

Squares and roots of 667991

667991 squared (667991²) is 446211976081
667991 cubed (667991³) is 298065584114323271
The square root of 667991 is 817.3071638007
The cube root of 667991 is 87.4158537989

Scales and comparisons

How big is 667991?

667,991 seconds is equal to 1 week, 17 hours, 33 minutes, 11 seconds.
To count from 1 to 667,991 would take you about seventeen hours!

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
A cube with a volume of 667991 cubic inches would be around 7.3 feet tall.

Recreational maths with 667991

667991 backwards is 199766
The number of decimal digits it has is: 6
The sum of 667991's digits is 38
More coming soon!

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The information we have on file for 667991 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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