720327664 has 40 divisors (see below), whose sum is σ = 1625119200. Its totient is φ = 302884608.

The previous prime is 720327631. The next prime is 720327679. The reversal of 720327664 is 466723027.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54739 + ... + 66610.

It is an arithmetic number, because the mean of its divisors is an integer number (40627980).

Almost surely, 2^720327664 is an apocalyptic number.

It is an amenable number.

720327664 is an abundant number, since it is smaller than the sum of its proper divisors (904791536).

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

720327664 is a wasteful number, since it uses less digits than its factorization.

720327664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121417 (or 121411 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 720327664 is about 26838.9206936494. The cubic root of 720327664 is about 896.4168911921.

The spelling of 720327664 in words is "seven hundred twenty million, three hundred twenty-seven thousand, six hundred sixty-four".