6679505856659 has 2 divisors, whose sum is σ = 6679505856660. Its totient is φ = 6679505856658.

The previous prime is 6679505856613. The next prime is 6679505856697. The reversal of 6679505856659 is 9566585059766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6679505856659 - 2²⁴ = 6679489079443 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6679505856659.

It is not a weakly prime, because it can be changed into another prime (6679505856559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3339752928329 + 3339752928330.

It is an arithmetic number, because the mean of its divisors is an integer number (3339752928330).

Almost surely, 2^{6679505856659} is an apocalyptic number.

6679505856659 is a deficient number, since it is larger than the sum of its proper divisors (1).

6679505856659 is an equidigital number, since it uses as much as digits as its factorization.

6679505856659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160000, while the sum is 77.

The spelling of 6679505856659 in words is "six trillion, six hundred seventy-nine billion, five hundred five million, eight hundred fifty-six thousand, six hundred fifty-nine".