664748195 has 16 divisors (see below), whose sum is σ = 845818848. Its totient is φ = 499806720.

The previous prime is 664748177. The next prime is 664748239. The reversal of 664748195 is 591847466.

664748195 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664748195 - 2⁸ = 664747939 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59180 + ... + 69510.

It is an arithmetic number, because the mean of its divisors is an integer number (52863678).

Almost surely, 2^664748195 is an apocalyptic number.

664748195 is a deficient number, since it is larger than the sum of its proper divisors (181070653).

664748195 is a wasteful number, since it uses less digits than its factorization.

664748195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110.

The product of its digits is 1451520, while the sum is 50.

The square root of 664748195 is about 25782.7111646545. The cubic root of 664748195 is about 872.7416899531.

The spelling of 664748195 in words is "six hundred sixty-four million, seven hundred forty-eight thousand, one hundred ninety-five".