664002044 has 24 divisors (see below), whose sum is σ = 1251613440. Its totient is φ = 307211184.

The previous prime is 664002043. The next prime is 664002047. The reversal of 664002044 is 440200466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664002043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98324 + ... + 104859.

It is an arithmetic number, because the mean of its divisors is an integer number (52150560).

Almost surely, 2^664002044 is an apocalyptic number.

It is an amenable number.

664002044 is a deficient number, since it is larger than the sum of its proper divisors (587611396).

664002044 is a wasteful number, since it uses less digits than its factorization.

664002044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203249 (or 203247 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 664002044 is about 25768.2371147116. The cubic root of 664002044 is about 872.4150294780.

The spelling of 664002044 in words is "six hundred sixty-four million, two thousand, forty-four".