664727223 has 8 divisors (see below), whose sum is σ = 886553200. Its totient is φ = 443026368.

The previous prime is 664727221. The next prime is 664727233. The reversal of 664727223 is 322727466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664727223 - 2¹ = 664727221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664727221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18088 + ... + 40701.

It is an arithmetic number, because the mean of its divisors is an integer number (110819150).

Almost surely, 2^664727223 is an apocalyptic number.

664727223 is a deficient number, since it is larger than the sum of its proper divisors (221825977).

664727223 is a wasteful number, since it uses less digits than its factorization.

664727223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62561.

The product of its digits is 169344, while the sum is 39.

The square root of 664727223 is about 25782.3044548000. The cubic root of 664727223 is about 872.7325118757.

The spelling of 664727223 in words is "six hundred sixty-four million, seven hundred twenty-seven thousand, two hundred twenty-three".