556551660 has 48 divisors (see below), whose sum is σ = 1780966656. Its totient is φ = 127211712.

The previous prime is 556551643. The next prime is 556551683. The reversal of 556551660 is 66155655.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662142 + ... + 662981.

It is an arithmetic number, because the mean of its divisors is an integer number (37103472).

Almost surely, 2^556551660 is an apocalyptic number.

It is an amenable number.

556551660 is an abundant number, since it is smaller than the sum of its proper divisors (1224414996).

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

556551660 is a wasteful number, since it uses less digits than its factorization.

556551660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325142 (or 1325140 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 556551660 is about 23591.3471425436. The cubic root of 556551660 is about 822.5617190531.

The spelling of 556551660 in words is "five hundred fifty-six million, five hundred fifty-one thousand, six hundred sixty".