5666636646 has 96 divisors (see below), whose sum is σ = 14186839680. Its totient is φ = 1616630400.

The previous prime is 5666636629. The next prime is 5666636671. The reversal of 5666636646 is 6466366665.

It is a happy number.

It is a super-2 number, since 2×5666636646² = 64221541755580258632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5666636592 and 5666636601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 608586 + ... + 617826.

It is an arithmetic number, because the mean of its divisors is an integer number (147779580).

Almost surely, 2^5666636646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5666636646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7093419840).

5666636646 is an abundant number, since it is smaller than the sum of its proper divisors (8520203034).

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

5666636646 is a wasteful number, since it uses less digits than its factorization.

5666636646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9442 (or 9439 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 54.

The square root of 5666636646 is about 75277.0658700245. The cubic root of 5666636646 is about 1782.8239320748.

The spelling of 5666636646 in words is "five billion, six hundred sixty-six million, six hundred thirty-six thousand, six hundred forty-six".