664553900 has 36 divisors (see below), whose sum is σ = 1443402408. Its totient is φ = 265578240.

The previous prime is 664553891. The next prime is 664553921. The reversal of 664553900 is 9355466.

664553900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140372 + ... + 145028.

Almost surely, 2^664553900 is an apocalyptic number.

It is an amenable number.

664553900 is an abundant number, since it is smaller than the sum of its proper divisors (778848508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664553900 is a wasteful number, since it uses less digits than its factorization.

664553900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6098 (or 6091 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 664553900 is about 25778.9429573829. The cubic root of 664553900 is about 872.6566523046.

The spelling of 664553900 in words is "six hundred sixty-four million, five hundred fifty-three thousand, nine hundred".