6777777786 has 48 divisors (see below), whose sum is σ = 14990914944. Its totient is φ = 2041084032.

The previous prime is 6777777757. The next prime is 6777777791. The reversal of 6777777786 is 6877777776.

It is a self number, because there is not a number n which added to its sum of digits gives 6777777786.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23451 + ... + 118766.

It is an arithmetic number, because the mean of its divisors is an integer number (312310728).

Almost surely, 2^6777777786 is an apocalyptic number.

6777777786 is an abundant number, since it is smaller than the sum of its proper divisors (8213137158).

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

6777777786 is a wasteful number, since it uses less digits than its factorization.

6777777786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142295 (or 142282 counting only the distinct ones).

The product of its digits is 237180384, while the sum is 69.

The square root of 6777777786 is about 82327.2602847927. The cubic root of 6777777786 is about 1892.4704577137.

The spelling of 6777777786 in words is "six billion, seven hundred seventy-seven million, seven hundred seventy-seven thousand, seven hundred eighty-six".