56988666 has 36 divisors (see below), whose sum is σ = 143636922. Its totient is φ = 16282224.

The previous prime is 56988661. The next prime is 56988667. The reversal of 56988666 is 66688965.

It can be written as a sum of positive squares in only one way, i.e., 52490025 + 4498641 = 7245^2 + 2121^2 .

It is not an unprimeable number, because it can be changed into a prime (56988661) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 31425 + ... + 33188.

Almost surely, 2^56988666 is an apocalyptic number.

56988666 is an abundant number, since it is smaller than the sum of its proper divisors (86648256).

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

56988666 is a wasteful number, since it uses less digits than its factorization.

56988666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64635 (or 64625 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 56988666 is about 7549.0837854669. The cubic root of 56988666 is about 384.8246033012.

The spelling of 56988666 in words is "fifty-six million, nine hundred eighty-eight thousand, six hundred sixty-six".