56660642 has 4 divisors (see below), whose sum is σ = 84990966. Its totient is φ = 28330320.

The previous prime is 56660623. The next prime is 56660671. The reversal of 56660642 is 24606665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 56265001 + 395641 = 7501^2 + 629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14165159 + ... + 14165162.

Almost surely, 2^56660642 is an apocalyptic number.

56660642 is a deficient number, since it is larger than the sum of its proper divisors (28330324).

56660642 is a wasteful number, since it uses less digits than its factorization.

56660642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28330323.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 56660642 is about 7527.3263513681. The cubic root of 56660642 is about 384.0848382068.

The spelling of 56660642 in words is "fifty-six million, six hundred sixty thousand, six hundred forty-two".