720992664 has 288 divisors, whose sum is σ = 2442632400. Its totient is φ = 198894528.

The previous prime is 720992663. The next prime is 720992669. The reversal of 720992664 is 466299027.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720992663) 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 71 ways as a sum of consecutive naturals, for example, 24861802 + ... + 24861830.

Almost surely, 2^720992664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720992664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1221316200).

720992664 is an abundant number, since it is smaller than the sum of its proper divisors (1721639736).

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

720992664 is an equidigital number, since it uses as much as digits as its factorization.

720992664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 720992664 is about 26851.3065603892. The cubic root of 720992664 is about 896.6926610087.

The spelling of 720992664 in words is "seven hundred twenty million, nine hundred ninety-two thousand, six hundred sixty-four".