56661404 has 24 divisors (see below), whose sum is σ = 100959600. Its totient is φ = 27820800.

The previous prime is 56661383. The next prime is 56661413. The reversal of 56661404 is 40416665.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55652 + ... + 56660.

It is an arithmetic number, because the mean of its divisors is an integer number (4206650).

Almost surely, 2^56661404 is an apocalyptic number.

It is an amenable number.

56661404 is a deficient number, since it is larger than the sum of its proper divisors (44298196).

56661404 is a wasteful number, since it uses less digits than its factorization.

56661404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253 (or 1251 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 56661404 is about 7527.3769667793. The cubic root of 56661404 is about 384.0865599859.

The spelling of 56661404 in words is "fifty-six million, six hundred sixty-one thousand, four hundred four".