6656507831 has 2 divisors, whose sum is σ = 6656507832. Its totient is φ = 6656507830.

The previous prime is 6656507813. The next prime is 6656507839. The reversal of 6656507831 is 1387056566.

6656507831 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (6656507813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6656507831 is a prime.

It is a super-2 number, since 2×6656507831² = 88618193008328649122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6656507839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328253915 + 3328253916.

It is an arithmetic number, because the mean of its divisors is an integer number (3328253916).

Almost surely, 2^6656507831 is an apocalyptic number.

6656507831 is a deficient number, since it is larger than the sum of its proper divisors (1).

6656507831 is an equidigital number, since it uses as much as digits as its factorization.

6656507831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 6656507831 is about 81587.4244660291. The cubic root of 6656507831 is about 1881.1155887294.

The spelling of 6656507831 in words is "six billion, six hundred fifty-six million, five hundred seven thousand, eight hundred thirty-one".