664247204 has 12 divisors (see below), whose sum is σ = 1202516700. Its totient is φ = 320671008.

The previous prime is 664247197. The next prime is 664247209. The reversal of 664247204 is 402742466.

It can be written as a sum of positive squares in 2 ways, for example, as 194658304 + 469588900 = 13952^2 + 21670^2 .

It is not an unprimeable number, because it can be changed into a prime (664247209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2863019 + ... + 2863250.

It is an arithmetic number, because the mean of its divisors is an integer number (100209725).

Almost surely, 2^664247204 is an apocalyptic number.

It is an amenable number.

664247204 is a deficient number, since it is larger than the sum of its proper divisors (538269496).

664247204 is a wasteful number, since it uses less digits than its factorization.

664247204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726302 (or 5726300 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 35.

The square root of 664247204 is about 25772.9936949513. The cubic root of 664247204 is about 872.5223860508.

The spelling of 664247204 in words is "six hundred sixty-four million, two hundred forty-seven thousand, two hundred four".