664223214 has 16 divisors (see below), whose sum is σ = 1342142928. Its totient is φ = 219124992.

The previous prime is 664223177. The next prime is 664223227. The reversal of 664223214 is 412322466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570057 + ... + 571220.

It is an arithmetic number, because the mean of its divisors is an integer number (83883933).

Almost surely, 2^664223214 is an apocalyptic number.

664223214 is an abundant number, since it is smaller than the sum of its proper divisors (677919714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664223214 is a wasteful number, since it uses less digits than its factorization.

664223214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141379.

The product of its digits is 13824, while the sum is 30.

The square root of 664223214 is about 25772.5282810981. The cubic root of 664223214 is about 872.5118818972.

The spelling of 664223214 in words is "six hundred sixty-four million, two hundred twenty-three thousand, two hundred fourteen".