56757207666 has 32 divisors (see below), whose sum is σ = 116170021440. Its totient is φ = 18476587584.

The previous prime is 56757207659. The next prime is 56757207679. The reversal of 56757207666 is 66670275765.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3466836 + ... + 3483168.

It is an arithmetic number, because the mean of its divisors is an integer number (3630313170).

Almost surely, 2^56757207666 is an apocalyptic number.

56757207666 is an abundant number, since it is smaller than the sum of its proper divisors (59412813774).

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

56757207666 is a wasteful number, since it uses less digits than its factorization.

56757207666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29850.

The product of its (nonzero) digits is 22226400, while the sum is 57.

The spelling of 56757207666 in words is "fifty-six billion, seven hundred fifty-seven million, two hundred seven thousand, six hundred sixty-six".