6777786868 has 12 divisors (see below), whose sum is σ = 11976284320. Its totient is φ = 3355991352.

The previous prime is 6777786803. The next prime is 6777786919. The reversal of 6777786868 is 8686877776.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6777786797 and 6777786806.

It is a congruent number.

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, 8225058 + ... + 8225881.

Almost surely, 2^6777786868 is an apocalyptic number.

It is an amenable number.

6777786868 is a deficient number, since it is larger than the sum of its proper divisors (5198497452).

6777786868 is a wasteful number, since it uses less digits than its factorization.

6777786868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16451046 (or 16451044 counting only the distinct ones).

The product of its digits is 265531392, while the sum is 70.

The square root of 6777786868 is about 82327.3154426889. The cubic root of 6777786868 is about 1892.4713029961.

The spelling of 6777786868 in words is "six billion, seven hundred seventy-seven million, seven hundred eighty-six thousand, eight hundred sixty-eight".