6636664839105 has 24 divisors (see below), whose sum is σ = 13146917015232. Its totient is φ = 3033903926304.

The previous prime is 6636664839089. The next prime is 6636664839131. The reversal of 6636664839105 is 5019384666366.

It is not a de Polignac number, because 6636664839105 - 2⁴ = 6636664839089 is a prime.

It is a super-2 number, since 2×6636664839105² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10534388319 + ... + 10534388948.

It is an arithmetic number, because the mean of its divisors is an integer number (547788208968).

Almost surely, 2^{6636664839105} is an apocalyptic number.

It is an amenable number.

6636664839105 is a deficient number, since it is larger than the sum of its proper divisors (6510252176127).

6636664839105 is a wasteful number, since it uses less digits than its factorization.

6636664839105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21068777285 (or 21068777282 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 63.

The spelling of 6636664839105 in words is "six trillion, six hundred thirty-six billion, six hundred sixty-four million, eight hundred thirty-nine thousand, one hundred five".