5666728664 has 32 divisors (see below), whose sum is σ = 10712196000. Its totient is φ = 2810200320.

The previous prime is 5666728631. The next prime is 5666728679. The reversal of 5666728664 is 4668276665.

It is a happy number.

It is a super-2 number, since 2×5666728664² = 64223627502798449792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903989 + ... + 910235.

It is an arithmetic number, because the mean of its divisors is an integer number (334756125).

Almost surely, 2^5666728664 is an apocalyptic number.

It is an amenable number.

5666728664 is a deficient number, since it is larger than the sum of its proper divisors (5045467336).

5666728664 is a wasteful number, since it uses less digits than its factorization.

5666728664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7163 (or 7159 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 56.

The square root of 5666728664 is about 75277.6770629913. The cubic root of 5666728664 is about 1782.8335821850.

The spelling of 5666728664 in words is "five billion, six hundred sixty-six million, seven hundred twenty-eight thousand, six hundred sixty-four".