6646568116 has 12 divisors (see below), whose sum is σ = 12032580420. Its totient is φ = 3208688000.

The previous prime is 6646568111. The next prime is 6646568177. The reversal of 6646568116 is 6118656466.

It can be written as a sum of positive squares in 2 ways, for example, as 2942628516 + 3703939600 = 54246^2 + 60860^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6646568116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646568111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28648885 + ... + 28649116.

It is an arithmetic number, because the mean of its divisors is an integer number (1002715035).

Almost surely, 2^6646568116 is an apocalyptic number.

It is an amenable number.

6646568116 is a deficient number, since it is larger than the sum of its proper divisors (5386012304).

6646568116 is a wasteful number, since it uses less digits than its factorization.

6646568116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57298034 (or 57298032 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 6646568116 is about 81526.4872050796. The cubic root of 6646568116 is about 1880.1788078760.

The spelling of 6646568116 in words is "six billion, six hundred forty-six million, five hundred sixty-eight thousand, one hundred sixteen".