664400024 has 16 divisors (see below), whose sum is σ = 1246309800. Its totient is φ = 332050752.

The previous prime is 664399993. The next prime is 664400047. The reversal of 664400024 is 420004466.

664400024 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 664399966 and 664400002.

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, 1547 + ... + 36485.

Almost surely, 2^664400024 is an apocalyptic number.

It is an amenable number.

664400024 is a deficient number, since it is larger than the sum of its proper divisors (581909776).

664400024 is a wasteful number, since it uses less digits than its factorization.

664400024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37322 (or 37318 counting only the distinct ones).

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

The square root of 664400024 is about 25775.9582557080. The cubic root of 664400024 is about 872.5892931932.

The spelling of 664400024 in words is "six hundred sixty-four million, four hundred thousand, twenty-four".