6779797749 has 24 divisors (see below), whose sum is σ = 10108870200. Its totient is φ = 4375340928.

The previous prime is 6779797729. The next prime is 6779797753. The reversal of 6779797749 is 9477979776.

It can be written as a sum of positive squares in 4 ways, for example, as 3032154225 + 3747643524 = 55065^2 + 61218^2 .

It is not a de Polignac number, because 6779797749 - 2²⁷ = 6645580021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6779797709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13927 + ... + 117275.

It is an arithmetic number, because the mean of its divisors is an integer number (421202925).

Almost surely, 2^6779797749 is an apocalyptic number.

It is an amenable number.

6779797749 is a deficient number, since it is larger than the sum of its proper divisors (3329072451).

6779797749 is a wasteful number, since it uses less digits than its factorization.

6779797749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103589 (or 103586 counting only the distinct ones).

The product of its digits is 294055272, while the sum is 72.

The square root of 6779797749 is about 82339.5272575693. The cubic root of 6779797749 is about 1892.6584416778.

The spelling of 6779797749 in words is "six billion, seven hundred seventy-nine million, seven hundred ninety-seven thousand, seven hundred forty-nine".