666617312 has 48 divisors (see below), whose sum is σ = 1340604720. Its totient is φ = 326218752.

The previous prime is 666617297. The next prime is 666617323. The reversal of 666617312 is 213716666.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323678 + ... + 325730.

It is an arithmetic number, because the mean of its divisors is an integer number (27929265).

Almost surely, 2^666617312 is an apocalyptic number.

It is an amenable number.

666617312 is an abundant number, since it is smaller than the sum of its proper divisors (673987408).

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

666617312 is a wasteful number, since it uses less digits than its factorization.

666617312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275 (or 2267 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 666617312 is about 25818.9332080162. The cubic root of 666617312 is about 873.5589065680.

The spelling of 666617312 in words is "six hundred sixty-six million, six hundred seventeen thousand, three hundred twelve".