664850379 has 4 divisors (see below), whose sum is σ = 886467176. Its totient is φ = 443233584.

The previous prime is 664850371. The next prime is 664850393. The reversal of 664850379 is 973058466.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 664850379 - 2³ = 664850371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664850371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110808394 + ... + 110808399.

It is an arithmetic number, because the mean of its divisors is an integer number (221616794).

Almost surely, 2^664850379 is an apocalyptic number.

664850379 is a deficient number, since it is larger than the sum of its proper divisors (221616797).

664850379 is a wasteful number, since it uses less digits than its factorization.

664850379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221616796.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 664850379 is about 25784.6927264996. The cubic root of 664850379 is about 872.7864064680.

The spelling of 664850379 in words is "six hundred sixty-four million, eight hundred fifty thousand, three hundred seventy-nine".