664421327000 has 32 divisors (see below), whose sum is σ = 1554745907520. Its totient is φ = 265768530400.

The previous prime is 664421326999. The next prime is 664421327027. The reversal of 664421327000 is 723124466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332209664 + ... + 332211663.

It is an arithmetic number, because the mean of its divisors is an integer number (48585809610).

Almost surely, 2^664421327000 is an apocalyptic number.

It is an amenable number.

664421327000 is an abundant number, since it is smaller than the sum of its proper divisors (890324580520).

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

664421327000 is a wasteful number, since it uses less digits than its factorization.

664421327000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664421348 (or 664421334 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 664421327000 in words is "six hundred sixty-four billion, four hundred twenty-one million, three hundred twenty-seven thousand".