5566561056 has 240 divisors, whose sum is σ = 19811506176. Its totient is φ = 1496807424.

The previous prime is 5566560997. The next prime is 5566561079. The reversal of 5566561056 is 6501656655.

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 39 ways as a sum of consecutive naturals, for example, 299425 + ... + 317471.

Almost surely, 2^5566561056 is an apocalyptic number.

5566561056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5566561056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9905753088).

5566561056 is an abundant number, since it is smaller than the sum of its proper divisors (14244945120).

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

5566561056 is a wasteful number, since it uses less digits than its factorization.

5566561056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18093 (or 18076 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The square root of 5566561056 is about 74609.3898648153. The cubic root of 5566561056 is about 1772.2663528268.

The spelling of 5566561056 in words is "five billion, five hundred sixty-six million, five hundred sixty-one thousand, fifty-six".