556661056 has 56 divisors (see below), whose sum is σ = 1336706496. Its totient is φ = 224532480.

The previous prime is 556661033. The next prime is 556661057. The reversal of 556661056 is 650166655.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556661057) 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, 28930 + ... + 44161.

Almost surely, 2^556661056 is an apocalyptic number.

556661056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

556661056 is an abundant number, since it is smaller than the sum of its proper divisors (780045440).

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

556661056 is a wasteful number, since it uses less digits than its factorization.

556661056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73127 (or 73117 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 556661056 is about 23593.6655905775. The cubic root of 556661056 is about 822.6156098675.

The spelling of 556661056 in words is "five hundred fifty-six million, six hundred sixty-one thousand, fifty-six".