6686169379 has 2 divisors, whose sum is σ = 6686169380. Its totient is φ = 6686169378.

The previous prime is 6686169349. The next prime is 6686169403. The reversal of 6686169379 is 9739616866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6686169379 - 2⁷ = 6686169251 is a prime.

It is not a weakly prime, because it can be changed into another prime (6686169349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3343084689 + 3343084690.

It is an arithmetic number, because the mean of its divisors is an integer number (3343084690).

Almost surely, 2^6686169379 is an apocalyptic number.

6686169379 is a deficient number, since it is larger than the sum of its proper divisors (1).

6686169379 is an equidigital number, since it uses as much as digits as its factorization.

6686169379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17635968, while the sum is 61.

The square root of 6686169379 is about 81769.0001100662. Note that the first 3 decimals coincide. The cubic root of 6686169379 is about 1883.9055465191.

The spelling of 6686169379 in words is "six billion, six hundred eighty-six million, one hundred sixty-nine thousand, three hundred seventy-nine".