56697279665 has 32 divisors (see below), whose sum is σ = 74213314560. Its totient is φ = 41330739456.

The previous prime is 56697279643. The next prime is 56697279673.

56697279665 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 56697279665 - 2⁶ = 56697279601 is a prime.

It is a super-2 number, since 2×56697279665² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56697279595 and 56697279604.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8051216 + ... + 8058254.

It is an arithmetic number, because the mean of its divisors is an integer number (2319166080).

Almost surely, 2^56697279665 is an apocalyptic number.

It is an amenable number.

56697279665 is a deficient number, since it is larger than the sum of its proper divisors (17516034895).

56697279665 is a wasteful number, since it uses less digits than its factorization.

56697279665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8633.

The product of its digits is 257191200, while the sum is 68.

The spelling of 56697279665 in words is "fifty-six billion, six hundred ninety-seven million, two hundred seventy-nine thousand, six hundred sixty-five".