6626136643 has 8 divisors (see below), whose sum is σ = 7748837888. Its totient is φ = 5547462984.

The previous prime is 6626136623. The next prime is 6626136653. The reversal of 6626136643 is 3466316266.

It is a happy number.

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

It is not a de Polignac number, because 6626136643 - 2⁵ = 6626136611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6626136643.

It is not an unprimeable number, because it can be changed into a prime (6626136623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11006571 + ... + 11007172.

It is an arithmetic number, because the mean of its divisors is an integer number (968604736).

Almost surely, 2^6626136643 is an apocalyptic number.

6626136643 is a deficient number, since it is larger than the sum of its proper divisors (1122701245).

6626136643 is a wasteful number, since it uses less digits than its factorization.

6626136643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22013793.

The product of its digits is 559872, while the sum is 43.

The square root of 6626136643 is about 81401.0850234811. The cubic root of 6626136643 is about 1878.2502811799.

The spelling of 6626136643 in words is "six billion, six hundred twenty-six million, one hundred thirty-six thousand, six hundred forty-three".