56866688666865 has 192 divisors, whose sum is σ = 130168347259392. Its totient is φ = 22234477363200.

The previous prime is 56866688666807. The next prime is 56866688666897.

56866688666865 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56866688666865 - 2¹⁶ = 56866688601329 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 159631345 + ... + 159987185.

It is an arithmetic number, because the mean of its divisors is an integer number (677960141976).

Almost surely, 2^{56866688666865} is an apocalyptic number.

56866688666865 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56866688666865 is an abundant number, since it is smaller than the sum of its proper divisors (73301658592527).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56866688666865 is a wasteful number, since it uses less digits than its factorization.

56866688666865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358600 (or 358597 counting only the distinct ones).

The product of its digits is 171992678400, while the sum is 90.

The spelling of 56866688666865 in words is "fifty-six trillion, eight hundred sixty-six billion, six hundred eighty-eight million, six hundred sixty-six thousand, eight hundred sixty-five".