3664574721 has 12 divisors (see below), whose sum is σ = 5294968848. Its totient is φ = 2442267864.

The previous prime is 3664574717. The next prime is 3664574729. The reversal of 3664574721 is 1274754663.

3664574721 is a `hidden beast` number, since 3 + 6 + 6 + 4 + 574 + 72 + 1 = 666.

3664574721 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3664574721 - 2² = 3664574717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3664574729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34735 + ... + 92388.

It is an arithmetic number, because the mean of its divisors is an integer number (441247404).

Almost surely, 2^3664574721 is an apocalyptic number.

It is an amenable number.

3664574721 is a deficient number, since it is larger than the sum of its proper divisors (1630394127).

3664574721 is a wasteful number, since it uses less digits than its factorization.

3664574721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130332 (or 130329 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 3664574721 is about 60535.7309446248. The cubic root of 3664574721 is about 1541.7283570710.

The spelling of 3664574721 in words is "three billion, six hundred sixty-four million, five hundred seventy-four thousand, seven hundred twenty-one".