56505666 has 32 divisors (see below), whose sum is σ = 129886848. Its totient is φ = 16053120.

The previous prime is 56505661. The next prime is 56505689. The reversal of 56505666 is 66650565.

It is a happy number.

56505666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (56505661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3886 + ... + 11318.

It is an arithmetic number, because the mean of its divisors is an integer number (4058964).

Almost surely, 2^56505666 is an apocalyptic number.

56505666 is an abundant number, since it is smaller than the sum of its proper divisors (73381182).

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

56505666 is a wasteful number, since it uses less digits than its factorization.

56505666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626.

The product of its (nonzero) digits is 162000, while the sum is 39.

The square root of 56505666 is about 7517.0250764515. The cubic root of 56505666 is about 383.7343404504.

The spelling of 56505666 in words is "fifty-six million, five hundred five thousand, six hundred sixty-six".