6779975808 has 128 divisors (see below), whose sum is σ = 19398931200. Its totient is φ = 2091156480.

The previous prime is 6779975771. The next prime is 6779975833. The reversal of 6779975808 is 8085799776.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302923 + ... + 324533.

It is an arithmetic number, because the mean of its divisors is an integer number (151554150).

Almost surely, 2^6779975808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6779975808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9699465600).

6779975808 is an abundant number, since it is smaller than the sum of its proper divisors (12618955392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6779975808 is a wasteful number, since it uses less digits than its factorization.

6779975808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21690 (or 21678 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 66.

The square root of 6779975808 is about 82340.6084990875. The cubic root of 6779975808 is about 1892.6750106047.

The spelling of 6779975808 in words is "six billion, seven hundred seventy-nine million, nine hundred seventy-five thousand, eight hundred eight".