660764456 has 32 divisors (see below), whose sum is σ = 1353153600. Its totient is φ = 299994240.

The previous prime is 660764443. The next prime is 660764477. The reversal of 660764456 is 654467066.

660764456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 79925 + ... + 87803.

It is an arithmetic number, because the mean of its divisors is an integer number (42286050).

Almost surely, 2^660764456 is an apocalyptic number.

It is an amenable number.

660764456 is an abundant number, since it is smaller than the sum of its proper divisors (692389144).

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

660764456 is a wasteful number, since it uses less digits than its factorization.

660764456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8849 (or 8845 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The square root of 660764456 is about 25705.3390563128. The cubic root of 660764456 is about 870.9947910932.

The spelling of 660764456 in words is "six hundred sixty million, seven hundred sixty-four thousand, four hundred fifty-six".