664125663659 has 2 divisors, whose sum is σ = 664125663660. Its totient is φ = 664125663658.

The previous prime is 664125663611. The next prime is 664125663703. The reversal of 664125663659 is 956366521466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664125663659 - 2²⁴ = 664108886443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664125663598 and 664125663607.

It is not a weakly prime, because it can be changed into another prime (664125663359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332062831829 + 332062831830.

It is an arithmetic number, because the mean of its divisors is an integer number (332062831830).

Almost surely, 2^664125663659 is an apocalyptic number.

664125663659 is a deficient number, since it is larger than the sum of its proper divisors (1).

664125663659 is an equidigital number, since it uses as much as digits as its factorization.

664125663659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41990400, while the sum is 59.

The spelling of 664125663659 in words is "six hundred sixty-four billion, one hundred twenty-five million, six hundred sixty-three thousand, six hundred fifty-nine".