6640143179 has 2 divisors, whose sum is σ = 6640143180. Its totient is φ = 6640143178.

The previous prime is 6640143157. The next prime is 6640143269. The reversal of 6640143179 is 9713410466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6640143179 - 2²⁸ = 6371707723 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6640143779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320071589 + 3320071590.

It is an arithmetic number, because the mean of its divisors is an integer number (3320071590).

Almost surely, 2^6640143179 is an apocalyptic number.

6640143179 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640143179 is an equidigital number, since it uses as much as digits as its factorization.

6640143179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 6640143179 is about 81487.0736927029. The cubic root of 6640143179 is about 1879.5727846032.

The spelling of 6640143179 in words is "six billion, six hundred forty million, one hundred forty-three thousand, one hundred seventy-nine".