6779081216 has 80 divisors (see below), whose sum is σ = 13754889720. Its totient is φ = 3337420800.

The previous prime is 6779081213. The next prime is 6779081251. The reversal of 6779081216 is 6121809776.

It can be written as a sum of positive squares in 4 ways, for example, as 5945026816 + 834054400 = 77104^2 + 28880^2 .

It is not an unprimeable number, because it can be changed into a prime (6779081213) 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, 17426750 + ... + 17427138.

Almost surely, 2^6779081216 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 6779081216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6877444860).

6779081216 is an abundant number, since it is smaller than the sum of its proper divisors (6975808504).

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

6779081216 is a wasteful number, since it uses less digits than its factorization.

6779081216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 829 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 6779081216 is about 82335.1760549524. The cubic root of 6779081216 is about 1892.5917631888.

The spelling of 6779081216 in words is "six billion, seven hundred seventy-nine million, eighty-one thousand, two hundred sixteen".