666044264 has 8 divisors (see below), whose sum is σ = 1248833010. Its totient is φ = 333022128.

The previous prime is 666044257. The next prime is 666044287. The reversal of 666044264 is 462440666.

666044264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 647295364 + 18748900 = 25442^2 + 4330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×666044264² = 887229923214603392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41627759 + ... + 41627774.

Almost surely, 2^666044264 is an apocalyptic number.

It is an amenable number.

666044264 is a deficient number, since it is larger than the sum of its proper divisors (582788746).

666044264 is a wasteful number, since it uses less digits than its factorization.

666044264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83255539 (or 83255535 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The square root of 666044264 is about 25807.8333844591. The cubic root of 666044264 is about 873.3085206840.

The spelling of 666044264 in words is "six hundred sixty-six million, forty-four thousand, two hundred sixty-four".