56566578 has 8 divisors (see below), whose sum is σ = 113133168. Its totient is φ = 18855524.

The previous prime is 56566577. The next prime is 56566579. The reversal of 56566578 is 87566565.

It is an interprime number because it is at equal distance from previous prime (56566577) and next prime (56566579).

It is a sphenic number, since it is the product of 3 distinct primes.

56566578 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56566571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4713876 + ... + 4713887.

It is an arithmetic number, because the mean of its divisors is an integer number (14141646).

Almost surely, 2^56566578 is an apocalyptic number.

56566578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

56566578 is a wasteful number, since it uses less digits than its factorization.

56566578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427768.

The product of its digits is 1512000, while the sum is 48.

The square root of 56566578 is about 7521.0755879728. The cubic root of 56566578 is about 383.8721769655.

The spelling of 56566578 in words is "fifty-six million, five hundred sixty-six thousand, five hundred seventy-eight".