6778899316 has 18 divisors (see below), whose sum is σ = 13799902578. Its totient is φ = 2905242480.

The previous prime is 6778899307. The next prime is 6778899349. The reversal of 6778899316 is 6139988776.

It can be written as a sum of positive squares in only one way, i.e., 5959222416 + 819676900 = 77196^2 + 28630^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17292915 + ... + 17293306.

Almost surely, 2^6778899316 is an apocalyptic number.

It is an amenable number.

6778899316 is an abundant number, since it is smaller than the sum of its proper divisors (7021003262).

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

6778899316 is a wasteful number, since it uses less digits than its factorization.

6778899316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34586239 (or 34586230 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 64.

The square root of 6778899316 is about 82334.0714163948. The cubic root of 6778899316 is about 1892.5748353530.

The spelling of 6778899316 in words is "six billion, seven hundred seventy-eight million, eight hundred ninety-nine thousand, three hundred sixteen".