666276812 has 12 divisors (see below), whose sum is σ = 1166192160. Its totient is φ = 333079056.

The previous prime is 666276799. The next prime is 666276823. The reversal of 666276812 is 218672666.

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, 18989 + ... + 41147.

It is an arithmetic number, because the mean of its divisors is an integer number (97182680).

Almost surely, 2^666276812 is an apocalyptic number.

It is an amenable number.

666276812 is a deficient number, since it is larger than the sum of its proper divisors (499915348).

666276812 is a wasteful number, since it uses less digits than its factorization.

666276812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29680 (or 29678 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 666276812 is about 25812.3383675327. The cubic root of 666276812 is about 873.4101468219.

The spelling of 666276812 in words is "six hundred sixty-six million, two hundred seventy-six thousand, eight hundred twelve".