6779915866 has 8 divisors (see below), whose sum is σ = 10406382624. Its totient is φ = 3311121660.

The previous prime is 6779915837. The next prime is 6779915881. The reversal of 6779915866 is 6685199776.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6779915798 and 6779915807.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39418030 + ... + 39418201.

It is an arithmetic number, because the mean of its divisors is an integer number (1300797828).

Almost surely, 2^6779915866 is an apocalyptic number.

6779915866 is a deficient number, since it is larger than the sum of its proper divisors (3626466758).

6779915866 is a wasteful number, since it uses less digits than its factorization.

6779915866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78836276.

The product of its digits is 34292160, while the sum is 64.

The square root of 6779915866 is about 82340.2445102029. The cubic root of 6779915866 is about 1892.6694328532.

The spelling of 6779915866 in words is "six billion, seven hundred seventy-nine million, nine hundred fifteen thousand, eight hundred sixty-six".