56616061665 has 16 divisors (see below), whose sum is σ = 90905796288. Its totient is φ = 30088533696.

The previous prime is 56616061643. The next prime is 56616061669.

56616061665 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56616061665 - 2⁵ = 56616061633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56616061669) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6664314 + ... + 6672803.

It is an arithmetic number, because the mean of its divisors is an integer number (5681612268).

Almost surely, 2^56616061665 is an apocalyptic number.

It is an amenable number.

56616061665 is a deficient number, since it is larger than the sum of its proper divisors (34289734623).

56616061665 is a wasteful number, since it uses less digits than its factorization.

56616061665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13337408.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 56616061665 in words is "fifty-six billion, six hundred sixteen million, sixty-one thousand, six hundred sixty-five".