666827012 has 12 divisors (see below), whose sum is σ = 1177275036. Its totient is φ = 330462720.

The previous prime is 666827009. The next prime is 666827033. The reversal of 666827012 is 210728666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78570496 + 588256516 = 8864^2 + 24254^2 .

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 3 ways as a sum of consecutive naturals, for example, 737189 + ... + 738092.

It is an arithmetic number, because the mean of its divisors is an integer number (98106253).

Almost surely, 2^666827012 is an apocalyptic number.

It is an amenable number.

666827012 is a deficient number, since it is larger than the sum of its proper divisors (510448024).

666827012 is a wasteful number, since it uses less digits than its factorization.

666827012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475398 (or 1475396 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 666827012 is about 25822.9938620602. The cubic root of 666827012 is about 873.6504963974.

The spelling of 666827012 in words is "six hundred sixty-six million, eight hundred twenty-seven thousand, twelve".