56566755 has 64 divisors (see below), whose sum is σ = 116505600. Its totient is φ = 25824096.

The previous prime is 56566753. The next prime is 56566771. The reversal of 56566755 is 55766565.

It is not a de Polignac number, because 56566755 - 2¹ = 56566753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 56566755.

It is not an unprimeable number, because it can be changed into a prime (56566753) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76176 + ... + 76914.

It is an arithmetic number, because the mean of its divisors is an integer number (1820400).

Almost surely, 2^56566755 is an apocalyptic number.

56566755 is an abundant number, since it is smaller than the sum of its proper divisors (59938845).

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

56566755 is an frugal number, since it uses more digits than its factorization.

56566755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 754 counting only the distinct ones).

The product of its digits is 945000, while the sum is 45.

The square root of 56566755 is about 7521.0873548976. The cubic root of 56566755 is about 383.8725773509.

The spelling of 56566755 in words is "fifty-six million, five hundred sixty-six thousand, seven hundred fifty-five".