664082568 has 36 divisors (see below), whose sum is σ = 1799149365. Its totient is φ = 221287968.

The previous prime is 664082563. The next prime is 664082579. The reversal of 664082568 is 865280466.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

664082568 is a `hidden beast` number, since 6 + 6 + 4 + 0 + 82 + 568 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 571114404 + 92968164 = 23898^2 + 9642^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18222.

It is not an unprimeable number, because it can be changed into a prime (664082561) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 217146 + ... + 220182.

Almost surely, 2^664082568 is an apocalyptic number.

It is an amenable number.

664082568 is an abundant number, since it is smaller than the sum of its proper divisors (1135066797).

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

664082568 is an equidigital number, since it uses as much as digits as its factorization.

664082568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6086 (or 3042 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 664082568 is about 25769.7995335625. The cubic root of 664082568 is about 872.4502941829.

The spelling of 664082568 in words is "six hundred sixty-four million, eighty-two thousand, five hundred sixty-eight".