56666303966 has 32 divisors (see below), whose sum is σ = 90379763712. Its totient is φ = 26554032000.

The previous prime is 56666303963. The next prime is 56666303971. The reversal of 56666303966 is 66930366665.

It is a super-2 number, since 2×56666303966² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56666303963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9367955 + ... + 9374001.

It is an arithmetic number, because the mean of its divisors is an integer number (2824367616).

Almost surely, 2^56666303966 is an apocalyptic number.

56666303966 is a deficient number, since it is larger than the sum of its proper divisors (33713459746).

56666303966 is a wasteful number, since it uses less digits than its factorization.

56666303966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7184.

The product of its (nonzero) digits is 18895680, while the sum is 56.

The spelling of 56666303966 in words is "fifty-six billion, six hundred sixty-six million, three hundred three thousand, nine hundred sixty-six".