666276877812 has 48 divisors (see below), whose sum is σ = 1913410524032. Its totient is φ = 175721374080.

The previous prime is 666276877793. The next prime is 666276877813. The reversal of 666276877812 is 218778672666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666276877813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305070739 + ... + 305072922.

Almost surely, 2^666276877812 is an apocalyptic number.

It is an amenable number.

666276877812 is an abundant number, since it is smaller than the sum of its proper divisors (1247133646220).

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

666276877812 is a wasteful number, since it uses less digits than its factorization.

666276877812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610143688 (or 610143686 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 66.

The spelling of 666276877812 in words is "six hundred sixty-six billion, two hundred seventy-six million, eight hundred seventy-seven thousand, eight hundred twelve".