56661886177 has 12 divisors (see below), whose sum is σ = 61453121664. Its totient is φ = 52220291760.

The previous prime is 56661886117. The next prime is 56661886189. The reversal of 56661886177 is 77168816665.

It is a happy number.

56661886177 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-56661886177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56661886117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159033 + ... + 372310.

It is an arithmetic number, because the mean of its divisors is an integer number (5121093472).

Almost surely, 2^56661886177 is an apocalyptic number.

It is an amenable number.

56661886177 is a deficient number, since it is larger than the sum of its proper divisors (4791235487).

56661886177 is a wasteful number, since it uses less digits than its factorization.

56661886177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532000 (or 531987 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 61.

The spelling of 56661886177 in words is "fifty-six billion, six hundred sixty-one million, eight hundred eighty-six thousand, one hundred seventy-seven".