664595744 has 12 divisors (see below), whose sum is σ = 1308422934. Its totient is φ = 332297856.

The previous prime is 664595719. The next prime is 664595753. The reversal of 664595744 is 447595466.

664595744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 624400144 + 40195600 = 24988^2 + 6340^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664595692 and 664595701.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10384277 + ... + 10384340.

Almost surely, 2^664595744 is an apocalyptic number.

It is an amenable number.

664595744 is a deficient number, since it is larger than the sum of its proper divisors (643827190).

664595744 is a wasteful number, since it uses less digits than its factorization.

664595744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20768627 (or 20768619 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 50.

The square root of 664595744 is about 25779.7545372333. The cubic root of 664595744 is about 872.6749676881.

The spelling of 664595744 in words is "six hundred sixty-four million, five hundred ninety-five thousand, seven hundred forty-four".