664231574 has 8 divisors (see below), whose sum is σ = 996456720. Its totient is φ = 332079336.

The previous prime is 664231571. The next prime is 664231609. The reversal of 664231574 is 475132466.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664231571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26672 + ... + 45164.

It is an arithmetic number, because the mean of its divisors is an integer number (124557090).

Almost surely, 2^664231574 is an apocalyptic number.

664231574 is a deficient number, since it is larger than the sum of its proper divisors (332225146).

664231574 is a wasteful number, since it uses less digits than its factorization.

664231574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36454.

The product of its digits is 120960, while the sum is 38.

The square root of 664231574 is about 25772.6904687889. The cubic root of 664231574 is about 872.5155423979.

The spelling of 664231574 in words is "six hundred sixty-four million, two hundred thirty-one thousand, five hundred seventy-four".