56665693888 has 28 divisors (see below), whose sum is σ = 112661879832. Its totient is φ = 28278448640.

The previous prime is 56665693831. The next prime is 56665693897. The reversal of 56665693888 is 88839656665.

It is a super-2 number, since 2×56665693888² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816370 + ... + 883057.

Almost surely, 2^56665693888 is an apocalyptic number.

It is an amenable number.

56665693888 is a deficient number, since it is larger than the sum of its proper divisors (55996185944).

56665693888 is a wasteful number, since it uses less digits than its factorization.

56665693888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699960 (or 1699950 counting only the distinct ones).

The product of its digits is 447897600, while the sum is 70.

The spelling of 56665693888 in words is "fifty-six billion, six hundred sixty-five million, six hundred ninety-three thousand, eight hundred eighty-eight".