6806666719 has 2 divisors, whose sum is σ = 6806666720. Its totient is φ = 6806666718.

The previous prime is 6806666717. The next prime is 6806666743. The reversal of 6806666719 is 9176666086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6806666719 - 2¹ = 6806666717 is a prime.

It is a super-2 number, since 2×6806666719² = 92661423647084449922, which contains 22 as substring.

Together with 6806666717, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6806666719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6806666717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3403333359 + 3403333360.

It is an arithmetic number, because the mean of its divisors is an integer number (3403333360).

Almost surely, 2^6806666719 is an apocalyptic number.

6806666719 is a deficient number, since it is larger than the sum of its proper divisors (1).

6806666719 is an equidigital number, since it uses as much as digits as its factorization.

6806666719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The square root of 6806666719 is about 82502.5255310406. The cubic root of 6806666719 is about 1895.1554065758.

The spelling of 6806666719 in words is "six billion, eight hundred six million, six hundred sixty-six thousand, seven hundred nineteen".