660057992 has 32 divisors (see below), whose sum is σ = 1351442880. Its totient is φ = 299732160.

The previous prime is 660057971. The next prime is 660058027. The reversal of 660057992 is 299750066.

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

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 104558 + ... + 110690.

It is an arithmetic number, because the mean of its divisors is an integer number (42232590).

Almost surely, 2^660057992 is an apocalyptic number.

It is an amenable number.

660057992 is an abundant number, since it is smaller than the sum of its proper divisors (691384888).

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

660057992 is a wasteful number, since it uses less digits than its factorization.

660057992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7373 (or 7369 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 660057992 is about 25691.5938003075. The cubic root of 660057992 is about 870.6842689985.

The spelling of 660057992 in words is "six hundred sixty million, fifty-seven thousand, nine hundred ninety-two".