664233666 has 24 divisors (see below), whose sum is σ = 1338893232. Its totient is φ = 219687000.

The previous prime is 664233653. The next prime is 664233709. The reversal of 664233666 is 666332466.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99741 + ... + 106191.

It is an arithmetic number, because the mean of its divisors is an integer number (55787218).

Almost surely, 2^664233666 is an apocalyptic number.

664233666 is an abundant number, since it is smaller than the sum of its proper divisors (674659566).

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

664233666 is a wasteful number, since it uses less digits than its factorization.

664233666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718 (or 6587 counting only the distinct ones).

The product of its digits is 559872, while the sum is 42.

The square root of 664233666 is about 25772.7310543528. The cubic root of 664233666 is about 872.5164583940.

The spelling of 664233666 in words is "six hundred sixty-four million, two hundred thirty-three thousand, six hundred sixty-six".