6636676639 has 4 divisors (see below), whose sum is σ = 6637843224. Its totient is φ = 6635510056.

The previous prime is 6636676637. The next prime is 6636676741. The reversal of 6636676639 is 9366766366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6636676639 - 2¹ = 6636676637 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 (6636676637) 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, 574717 + ... + 586150.

It is an arithmetic number, because the mean of its divisors is an integer number (1659460806).

Almost surely, 2^6636676639 is an apocalyptic number.

6636676639 is a deficient number, since it is larger than the sum of its proper divisors (1166585).

6636676639 is a wasteful number, since it uses less digits than its factorization.

6636676639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166584.

The product of its digits is 26453952, while the sum is 58.

The square root of 6636676639 is about 81465.8004257001. The cubic root of 6636676639 is about 1879.2456456527.

The spelling of 6636676639 in words is "six billion, six hundred thirty-six million, six hundred seventy-six thousand, six hundred thirty-nine".