556635366 has 72 divisors (see below), whose sum is σ = 1399160880. Its totient is φ = 156670848.

The previous prime is 556635337. The next prime is 556635379. The reversal of 556635366 is 663536655.

556635366 is a `hidden beast` number, since 5 + 5 + 6 + 635 + 3 + 6 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 671040 + ... + 671868.

It is an arithmetic number, because the mean of its divisors is an integer number (19432790).

Almost surely, 2^556635366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556635366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699580440).

556635366 is an abundant number, since it is smaller than the sum of its proper divisors (842525514).

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

556635366 is a wasteful number, since it uses less digits than its factorization.

556635366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 914 counting only the distinct ones).

The product of its digits is 1458000, while the sum is 45.

The square root of 556635366 is about 23593.1211585072. The cubic root of 556635366 is about 822.6029550572.

The spelling of 556635366 in words is "five hundred fifty-six million, six hundred thirty-five thousand, three hundred sixty-six".