56670666 has 64 divisors (see below), whose sum is σ = 131604480. Its totient is φ = 16125120.

The previous prime is 56670659. The next prime is 56670667. The reversal of 56670666 is 66607665.

56670666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (56670667) 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 31 ways as a sum of consecutive naturals, for example, 55105 + ... + 56123.

It is an arithmetic number, because the mean of its divisors is an integer number (2056320).

Almost surely, 2^56670666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56670666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65802240).

56670666 is an abundant number, since it is smaller than the sum of its proper divisors (74933814).

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

56670666 is a wasteful number, since it uses less digits than its factorization.

56670666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 56670666 is about 7527.9921625889. The cubic root of 56670666 is about 384.1074867288.

The spelling of 56670666 in words is "fifty-six million, six hundred seventy thousand, six hundred sixty-six".