664442104 has 16 divisors (see below), whose sum is σ = 1246104720. Its totient is φ = 332147520.

The previous prime is 664442089. The next prime is 664442111. The reversal of 664442104 is 401244466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58749 + ... + 69139.

It is an arithmetic number, because the mean of its divisors is an integer number (77881545).

Almost surely, 2^664442104 is an apocalyptic number.

It is an amenable number.

664442104 is a deficient number, since it is larger than the sum of its proper divisors (581662616).

664442104 is a wasteful number, since it uses less digits than its factorization.

664442104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18390 (or 18386 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 664442104 is about 25776.7745072963. The cubic root of 664442104 is about 872.6077147169.

The spelling of 664442104 in words is "six hundred sixty-four million, four hundred forty-two thousand, one hundred four".