556491660 has 24 divisors (see below), whose sum is σ = 1558176816. Its totient is φ = 148397760.

The previous prime is 556491659. The next prime is 556491667. The reversal of 556491660 is 66194655.

It is not an unprimeable number, because it can be changed into a prime (556491667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4637371 + ... + 4637490.

It is an arithmetic number, because the mean of its divisors is an integer number (64924034).

Almost surely, 2^556491660 is an apocalyptic number.

It is an amenable number.

556491660 is an abundant number, since it is smaller than the sum of its proper divisors (1001685156).

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

556491660 is a wasteful number, since it uses less digits than its factorization.

556491660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9274873 (or 9274871 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 556491660 is about 23590.0754555809. The cubic root of 556491660 is about 822.5321587682.

The spelling of 556491660 in words is "five hundred fifty-six million, four hundred ninety-one thousand, six hundred sixty".