56656665065651 has 8 divisors (see below), whose sum is σ = 64757850040320. Its totient is φ = 48557324010888.

The previous prime is 56656665065563. The next prime is 56656665065659. The reversal of 56656665065651 is 15656056665665.

56656665065651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56656665065651 - 2¹⁸ = 56656664803507 is a prime.

It is a super-2 number, since 2×56656665065651² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56656665065659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460914131 + ... + 461037036.

It is an arithmetic number, because the mean of its divisors is an integer number (8094731255040).

Almost surely, 2^{56656665065651} is an apocalyptic number.

56656665065651 is a deficient number, since it is larger than the sum of its proper divisors (8101184974669).

56656665065651 is an equidigital number, since it uses as much as digits as its factorization.

56656665065651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921959953.

The product of its (nonzero) digits is 874800000, while the sum is 68.

The spelling of 56656665065651 in words is "fifty-six trillion, six hundred fifty-six billion, six hundred sixty-five million, sixty-five thousand, six hundred fifty-one".