5665566720 has 416 divisors, whose sum is σ = 20211980544. Its totient is φ = 1343488000.

The previous prime is 5665566713. The next prime is 5665566773. The reversal of 5665566720 is 276655665.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 5665566720.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56094670 + ... + 56094770.

Almost surely, 2^5665566720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5665566720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10105990272).

5665566720 is an abundant number, since it is smaller than the sum of its proper divisors (14546413824).

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

5665566720 is a wasteful number, since it uses less digits than its factorization.

5665566720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 48.

The square root of 5665566720 is about 75269.9589477768. The cubic root of 5665566720 is about 1782.7117191425.

The spelling of 5665566720 in words is "five billion, six hundred sixty-five million, five hundred sixty-six thousand, seven hundred twenty".