5566955856 has 320 divisors, whose sum is σ = 18641664000. Its totient is φ = 1418726400.

The previous prime is 5566955819. The next prime is 5566955873. The reversal of 5566955856 is 6585596655.

It is a self number, because there is not a number n which added to its sum of digits gives 5566955856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10684876 + ... + 10685396.

It is an arithmetic number, because the mean of its divisors is an integer number (58255200).

Almost surely, 2^5566955856 is an apocalyptic number.

5566955856 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 5566955856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9320832000).

5566955856 is an abundant number, since it is smaller than the sum of its proper divisors (13074708144).

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

5566955856 is a wasteful number, since it uses less digits than its factorization.

5566955856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 603 counting only the distinct ones).

The product of its digits is 48600000, while the sum is 60.

The square root of 5566955856 is about 74612.0355974825. The cubic root of 5566955856 is about 1772.3082502813.

The spelling of 5566955856 in words is "five billion, five hundred sixty-six million, nine hundred fifty-five thousand, eight hundred fifty-six".