6684128169 has 16 divisors (see below), whose sum is σ = 9066788160. Its totient is φ = 4379094720.

The previous prime is 6684128117. The next prime is 6684128177. The reversal of 6684128169 is 9618214866.

It is not a de Polignac number, because 6684128169 - 2⁹ = 6684127657 is a prime.

It is a super-2 number, since 2×6684128169² = 89355138759238585122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6684128189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45127 + ... + 124115.

It is an arithmetic number, because the mean of its divisors is an integer number (566674260).

Almost surely, 2^6684128169 is an apocalyptic number.

It is an amenable number.

6684128169 is a deficient number, since it is larger than the sum of its proper divisors (2382659991).

6684128169 is a wasteful number, since it uses less digits than its factorization.

6684128169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79480.

The product of its digits is 995328, while the sum is 51.

The square root of 6684128169 is about 81756.5175934005. The cubic root of 6684128169 is about 1883.7138154988.

The spelling of 6684128169 in words is "six billion, six hundred eighty-four million, one hundred twenty-eight thousand, one hundred sixty-nine".