6779926665 has 32 divisors (see below), whose sum is σ = 12347193600. Its totient is φ = 3527763840.

The previous prime is 6779926661. The next prime is 6779926691. The reversal of 6779926665 is 5666299776.

It is not a de Polignac number, because 6779926665 - 2² = 6779926661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6779926661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 606925 + ... + 617994.

It is an arithmetic number, because the mean of its divisors is an integer number (385849800).

Almost surely, 2^6779926665 is an apocalyptic number.

It is an amenable number.

6779926665 is a deficient number, since it is larger than the sum of its proper divisors (5567266935).

6779926665 is a wasteful number, since it uses less digits than its factorization.

6779926665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224974 (or 1224968 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 63.

The square root of 6779926665 is about 82340.3100856440. The cubic root of 6779926665 is about 1892.6704377293.

The spelling of 6779926665 in words is "six billion, seven hundred seventy-nine million, nine hundred twenty-six thousand, six hundred sixty-five".