56668404 has 36 divisors (see below), whose sum is σ = 143185056. Its totient is φ = 17435808.

The previous prime is 56668397. The next prime is 56668411. The reversal of 56668404 is 40486665.

It is an interprime number because it is at equal distance from previous prime (56668397) and next prime (56668411).

It is a super-2 number, since 2×56668404² = 6422616023814432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11944 + ... + 15999.

Almost surely, 2^56668404 is an apocalyptic number.

It is an amenable number.

56668404 is an abundant number, since it is smaller than the sum of its proper divisors (86516652).

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

56668404 is a wasteful number, since it uses less digits than its factorization.

56668404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27976 (or 27961 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 56668404 is about 7527.8419218259. The cubic root of 56668404 is about 384.1023761325.

The spelling of 56668404 in words is "fifty-six million, six hundred sixty-eight thousand, four hundred four".