720758664 has 48 divisors (see below), whose sum is σ = 1981203120. Its totient is φ = 236665440.

The previous prime is 720758653. The next prime is 720758669. The reversal of 720758664 is 466857027.

720758664 is a `hidden beast` number, since 7 + 2 + 0 + 7 + 586 + 64 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (720758669) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 69882 + ... + 79529.

It is an arithmetic number, because the mean of its divisors is an integer number (41275065).

Almost surely, 2^720758664 is an apocalyptic number.

It is an amenable number.

720758664 is an abundant number, since it is smaller than the sum of its proper divisors (1260444456).

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

720758664 is a wasteful number, since it uses less digits than its factorization.

720758664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149490 (or 149483 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The square root of 720758664 is about 26846.9488769208. The cubic root of 720758664 is about 896.5956425520.

The spelling of 720758664 in words is "seven hundred twenty million, seven hundred fifty-eight thousand, six hundred sixty-four".