664523266 has 8 divisors (see below), whose sum is σ = 1087401744. Its totient is φ = 302056020.

The previous prime is 664523261. The next prime is 664523267. The reversal of 664523266 is 662325466.

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

It is not an unprimeable number, because it can be changed into a prime (664523261) 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, 15102780 + ... + 15102823.

It is an arithmetic number, because the mean of its divisors is an integer number (135925218).

Almost surely, 2^664523266 is an apocalyptic number.

664523266 is a deficient number, since it is larger than the sum of its proper divisors (422878478).

664523266 is a wasteful number, since it uses less digits than its factorization.

664523266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30205616.

The product of its digits is 311040, while the sum is 40.

The square root of 664523266 is about 25778.3487834268. The cubic root of 664523266 is about 872.6432431215.

The spelling of 664523266 in words is "six hundred sixty-four million, five hundred twenty-three thousand, two hundred sixty-six".