56666784 has 24 divisors (see below), whose sum is σ = 148750560. Its totient is φ = 18888896.

The previous prime is 56666773. The next prime is 56666803. The reversal of 56666784 is 48766665.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×56666784² = 6422248817805312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295044 + ... + 295235.

It is an arithmetic number, because the mean of its divisors is an integer number (6197940).

Almost surely, 2^56666784 is an apocalyptic number.

It is an amenable number.

56666784 is an abundant number, since it is smaller than the sum of its proper divisors (92083776).

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

56666784 is a wasteful number, since it uses less digits than its factorization.

56666784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590292 (or 590284 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The square root of 56666784 is about 7527.7343204978. The cubic root of 56666784 is about 384.0987159401.

The spelling of 56666784 in words is "fifty-six million, six hundred sixty-six thousand, seven hundred eighty-four".