6694445779 has 16 divisors (see below), whose sum is σ = 7927144128. Its totient is φ = 5533581312.

The previous prime is 6694445749. The next prime is 6694445789. The reversal of 6694445779 is 9775444966.

It is a de Polignac number, because none of the positive numbers 2^k-6694445779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6694445749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85102 + ... + 143635.

It is an arithmetic number, because the mean of its divisors is an integer number (495446508).

Almost surely, 2^6694445779 is an apocalyptic number.

6694445779 is a deficient number, since it is larger than the sum of its proper divisors (1232698349).

6694445779 is a wasteful number, since it uses less digits than its factorization.

6694445779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228894.

The product of its digits is 45722880, while the sum is 61.

The square root of 6694445779 is about 81819.5928797009. The cubic root of 6694445779 is about 1884.6825498105.

The spelling of 6694445779 in words is "six billion, six hundred ninety-four million, four hundred forty-five thousand, seven hundred seventy-nine".