664140179 has 2 divisors, whose sum is σ = 664140180. Its totient is φ = 664140178.

The previous prime is 664140151. The next prime is 664140199. The reversal of 664140179 is 971041466.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664140179 - 2⁸ = 664139923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (664140149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332070089 + 332070090.

It is an arithmetic number, because the mean of its divisors is an integer number (332070090).

Almost surely, 2^664140179 is an apocalyptic number.

664140179 is a deficient number, since it is larger than the sum of its proper divisors (1).

664140179 is an equidigital number, since it uses as much as digits as its factorization.

664140179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 664140179 is about 25770.9173100222. The cubic root of 664140179 is about 872.4755226122.

The spelling of 664140179 in words is "six hundred sixty-four million, one hundred forty thousand, one hundred seventy-nine".