6641171879 has 2 divisors, whose sum is σ = 6641171880. Its totient is φ = 6641171878.

The previous prime is 6641171813. The next prime is 6641171903. The reversal of 6641171879 is 9781711466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6641171879 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6641171279) 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, 3320585939 + 3320585940.

It is an arithmetic number, because the mean of its divisors is an integer number (3320585940).

Almost surely, 2^6641171879 is an apocalyptic number.

6641171879 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641171879 is an equidigital number, since it uses as much as digits as its factorization.

6641171879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 50.

The square root of 6641171879 is about 81493.3854923208. The cubic root of 6641171879 is about 1879.6698415809.

The spelling of 6641171879 in words is "six billion, six hundred forty-one million, one hundred seventy-one thousand, eight hundred seventy-nine".