720564866 has 8 divisors (see below), whose sum is σ = 1235254080. Its totient is φ = 308813508.

The previous prime is 720564851. The next prime is 720564877. The reversal of 720564866 is 668465027.

720564866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×720564866² = 1038427452227195912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25734446 + ... + 25734473.

It is an arithmetic number, because the mean of its divisors is an integer number (154406760).

Almost surely, 2^720564866 is an apocalyptic number.

720564866 is a deficient number, since it is larger than the sum of its proper divisors (514689214).

720564866 is a wasteful number, since it uses less digits than its factorization.

720564866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51468928.

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 720564866 is about 26843.3393228190. The cubic root of 720564866 is about 896.5152762996.

The spelling of 720564866 in words is "seven hundred twenty million, five hundred sixty-four thousand, eight hundred sixty-six".