664125266 has 16 divisors (see below), whose sum is σ = 1145321856. Its totient is φ = 282919776.

The previous prime is 664125251. The next prime is 664125289. The reversal of 664125266 is 662521466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139691 + ... + 144366.

It is an arithmetic number, because the mean of its divisors is an integer number (71582616).

Almost surely, 2^664125266 is an apocalyptic number.

664125266 is a deficient number, since it is larger than the sum of its proper divisors (481196590).

664125266 is a wasteful number, since it uses less digits than its factorization.

664125266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284233.

The product of its digits is 103680, while the sum is 38.

The square root of 664125266 is about 25770.6279706180. The cubic root of 664125266 is about 872.4689922013.

The spelling of 664125266 in words is "six hundred sixty-four million, one hundred twenty-five thousand, two hundred sixty-six".