660577420 has 12 divisors (see below), whose sum is σ = 1387212624. Its totient is φ = 264230960.

The previous prime is 660577417. The next prime is 660577441. The reversal of 660577420 is 24775066.

It is a self number, because there is not a number n which added to its sum of digits gives 660577420.

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 3 ways as a sum of consecutive naturals, for example, 16514416 + ... + 16514455.

It is an arithmetic number, because the mean of its divisors is an integer number (115601052).

Almost surely, 2^660577420 is an apocalyptic number.

It is an amenable number.

660577420 is an abundant number, since it is smaller than the sum of its proper divisors (726635204).

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

660577420 is a wasteful number, since it uses less digits than its factorization.

660577420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33028880 (or 33028878 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 660577420 is about 25701.7007219367. The cubic root of 660577420 is about 870.9126020703.

The spelling of 660577420 in words is "six hundred sixty million, five hundred seventy-seven thousand, four hundred twenty".