5666624221 has 8 divisors (see below), whose sum is σ = 5718421944. Its totient is φ = 5614855680.

The previous prime is 5666624209. The next prime is 5666624317. The reversal of 5666624221 is 1224266665.

5666624221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1076561721 + 4590062500 = 32811^2 + 67750^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5666624221 - 2⁵ = 5666624189 is a prime.

It is a super-2 number, since 2×5666624221² = 64221260124047713682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5666624521) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 643911 + ... + 652651.

It is an arithmetic number, because the mean of its divisors is an integer number (714802743).

Almost surely, 2^5666624221 is an apocalyptic number.

It is an amenable number.

5666624221 is a deficient number, since it is larger than the sum of its proper divisors (51797723).

5666624221 is a wasteful number, since it uses less digits than its factorization.

5666624221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14591.

The product of its digits is 207360, while the sum is 40.

The square root of 5666624221 is about 75276.9833415235. The cubic root of 5666624221 is about 1782.8226290324.

The spelling of 5666624221 in words is "five billion, six hundred sixty-six million, six hundred twenty-four thousand, two hundred twenty-one".