6921167164 has 24 divisors (see below), whose sum is σ = 13094105360. Its totient is φ = 3189839616.

The previous prime is 6921167161. The next prime is 6921167191. The reversal of 6921167164 is 4617611296.

It is a self number, because there is not a number n which added to its sum of digits gives 6921167164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6921167161) 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, 1227837 + ... + 1233460.

Almost surely, 2^6921167164 is an apocalyptic number.

It is an amenable number.

6921167164 is a deficient number, since it is larger than the sum of its proper divisors (6172938196).

6921167164 is a wasteful number, since it uses less digits than its factorization.

6921167164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461357 (or 2461355 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 6921167164 is about 83193.5524184417. The cubic root of 6921167164 is about 1905.7230179894.

The spelling of 6921167164 in words is "six billion, nine hundred twenty-one million, one hundred sixty-seven thousand, one hundred sixty-four".