56776665660 has 96 divisors (see below), whose sum is σ = 186767465472. Its totient is φ = 12705265920.

The previous prime is 56776665611. The next prime is 56776665677. The reversal of 56776665660 is 6656667765.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 56776665594 and 56776665603.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 3300084 + ... + 3317243.

It is an arithmetic number, because the mean of its divisors is an integer number (1945494432).

Almost surely, 2^56776665660 is an apocalyptic number.

It is an amenable number.

56776665660 is an abundant number, since it is smaller than the sum of its proper divisors (129990799812).

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

56776665660 is a wasteful number, since it uses less digits than its factorization.

56776665660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6617363 (or 6617361 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 60.

The spelling of 56776665660 in words is "fifty-six billion, seven hundred seventy-six million, six hundred sixty-five thousand, six hundred sixty".