56665616 has 40 divisors (see below), whose sum is σ = 125896704. Its totient is φ = 24203520.

The previous prime is 56665603. The next prime is 56665621. The reversal of 56665616 is 61656665.

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, 42236 + ... + 43556.

Almost surely, 2^56665616 is an apocalyptic number.

56665616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

56665616 is an abundant number, since it is smaller than the sum of its proper divisors (69231088).

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

56665616 is a wasteful number, since it uses less digits than its factorization.

56665616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1713 counting only the distinct ones).

The product of its digits is 194400, while the sum is 41.

The square root of 56665616 is about 7527.6567403143. The cubic root of 56665616 is about 384.0960769433.

The spelling of 56665616 in words is "fifty-six million, six hundred sixty-five thousand, six hundred sixteen".