5566325221 has 16 divisors (see below), whose sum is σ = 5802678000. Its totient is φ = 5333106688.

The previous prime is 5566325209. The next prime is 5566325239. The reversal of 5566325221 is 1225236655.

It can be written as a sum of positive squares in 8 ways, for example, as 3260981025 + 2305344196 = 57105^2 + 48014^2 .

It is a cyclic number.

It is not a de Polignac number, because 5566325221 - 2²¹ = 5564228069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5566325321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2182455 + ... + 2185003.

It is an arithmetic number, because the mean of its divisors is an integer number (362667375).

Almost surely, 2^5566325221 is an apocalyptic number.

It is an amenable number.

5566325221 is a deficient number, since it is larger than the sum of its proper divisors (236352779).

5566325221 is a wasteful number, since it uses less digits than its factorization.

5566325221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128.

The product of its digits is 108000, while the sum is 37.

The square root of 5566325221 is about 74607.8093834687. The cubic root of 5566325221 is about 1772.2413243078.

The spelling of 5566325221 in words is "five billion, five hundred sixty-six million, three hundred twenty-five thousand, two hundred twenty-one".