56757207665 has 8 divisors (see below), whose sum is σ = 68598640320. Its totient is φ = 45079105392.

The previous prime is 56757207659. The next prime is 56757207679. The reversal of 56757207665 is 56670275765.

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

It is a cyclic number.

It is not a de Polignac number, because 56757207665 - 2¹⁶ = 56757142129 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 56757207665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40831829 + ... + 40833218.

It is an arithmetic number, because the mean of its divisors is an integer number (8574830040).

Almost surely, 2^56757207665 is an apocalyptic number.

It is an amenable number.

56757207665 is a deficient number, since it is larger than the sum of its proper divisors (11841432655).

56757207665 is a wasteful number, since it uses less digits than its factorization.

56757207665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81665191.

The product of its (nonzero) digits is 18522000, while the sum is 56.

The spelling of 56757207665 in words is "fifty-six billion, seven hundred fifty-seven million, two hundred seven thousand, six hundred sixty-five".