64664663204 has 12 divisors (see below), whose sum is σ = 113185328844. Its totient is φ = 32325997824.

The previous prime is 64664663197. The next prime is 64664663207. The reversal of 64664663204 is 40236646646.

It can be written as a sum of positive squares in 2 ways, for example, as 18198549604 + 46466113600 = 134902^2 + 215560^2 .

It is not an unprimeable number, because it can be changed into a prime (64664663207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560437 + ... + 1601340.

It is an arithmetic number, because the mean of its divisors is an integer number (9432110737).

Almost surely, 2^64664663204 is an apocalyptic number.

It is an amenable number.

64664663204 is a deficient number, since it is larger than the sum of its proper divisors (48520665640).

64664663204 is a wasteful number, since it uses less digits than its factorization.

64664663204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166894 (or 3166892 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 47.

The spelling of 64664663204 in words is "sixty-four billion, six hundred sixty-four million, six hundred sixty-three thousand, two hundred four".