666827312 has 40 divisors (see below), whose sum is σ = 1384505136. Its totient is φ = 310009856.

The previous prime is 666827303. The next prime is 666827327. The reversal of 666827312 is 213728666.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 666827312.

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, 7808 + ... + 37344.

Almost surely, 2^666827312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666827312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692252568).

666827312 is an abundant number, since it is smaller than the sum of its proper divisors (717677824).

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

666827312 is a wasteful number, since it uses less digits than its factorization.

666827312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29645 (or 29639 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 666827312 is about 25822.9996708361. Note that the first 3 decimals coincide. The cubic root of 666827312 is about 873.6506274134.

The spelling of 666827312 in words is "six hundred sixty-six million, eight hundred twenty-seven thousand, three hundred twelve".