6778751956 has 24 divisors (see below), whose sum is σ = 12001951584. Its totient is φ = 3349744800.

The previous prime is 6778751897. The next prime is 6778751963. The reversal of 6778751956 is 6591578776.

It is a junction number, because it is equal to n+sod(n) for n = 6778751894 and 6778751903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212551 + ... + 242353.

It is an arithmetic number, because the mean of its divisors is an integer number (500081316).

Almost surely, 2^6778751956 is an apocalyptic number.

It is an amenable number.

6778751956 is a deficient number, since it is larger than the sum of its proper divisors (5223199628).

6778751956 is a wasteful number, since it uses less digits than its factorization.

6778751956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30471 (or 30469 counting only the distinct ones).

The product of its digits is 22226400, while the sum is 61.

The square root of 6778751956 is about 82333.1765207683. The cubic root of 6778751956 is about 1892.5611216297.

The spelling of 6778751956 in words is "six billion, seven hundred seventy-eight million, seven hundred fifty-one thousand, nine hundred fifty-six".