56664807 has 16 divisors (see below), whose sum is σ = 78302208. Its totient is φ = 36411840.

The previous prime is 56664799. The next prime is 56664809. The reversal of 56664807 is 70846665.

It is a happy number.

56664807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56664807 - 2³ = 56664799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56664809) 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, 25243 + ... + 27395.

It is an arithmetic number, because the mean of its divisors is an integer number (4893888).

Almost surely, 2^56664807 is an apocalyptic number.

56664807 is a deficient number, since it is larger than the sum of its proper divisors (21637401).

56664807 is a wasteful number, since it uses less digits than its factorization.

56664807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 56664807 is about 7527.6030049412. The cubic root of 56664807 is about 384.0942490553.

The spelling of 56664807 in words is "fifty-six million, six hundred sixty-four thousand, eight hundred seven".