664223227 has 2 divisors, whose sum is σ = 664223228. Its totient is φ = 664223226.

The previous prime is 664223177. The next prime is 664223237. The reversal of 664223227 is 722322466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664223227 - 2²⁷ = 530005499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664223192 and 664223201.

It is not a weakly prime, because it can be changed into another prime (664223237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332111613 + 332111614.

It is an arithmetic number, because the mean of its divisors is an integer number (332111614).

Almost surely, 2^664223227 is an apocalyptic number.

664223227 is a deficient number, since it is larger than the sum of its proper divisors (1).

664223227 is an equidigital number, since it uses as much as digits as its factorization.

664223227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 34.

The square root of 664223227 is about 25772.5285333046. The cubic root of 664223227 is about 872.5118875894.

The spelling of 664223227 in words is "six hundred sixty-four million, two hundred twenty-three thousand, two hundred twenty-seven".