56400566 has 4 divisors (see below), whose sum is σ = 84600852. Its totient is φ = 28200282.

The previous prime is 56400541. The next prime is 56400601. The reversal of 56400566 is 66500465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66500465 = 5 ⋅13300093.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14100140 + ... + 14100143.

It is an arithmetic number, because the mean of its divisors is an integer number (21150213).

Almost surely, 2^56400566 is an apocalyptic number.

56400566 is a deficient number, since it is larger than the sum of its proper divisors (28200286).

56400566 is a wasteful number, since it uses less digits than its factorization.

56400566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28200285.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 56400566 is about 7510.0310252355. The cubic root of 56400566 is about 383.4962787203.

The spelling of 56400566 in words is "fifty-six million, four hundred thousand, five hundred sixty-six".