12712866021666 has 48 divisors (see below), whose sum is σ = 27879644651040. Its totient is φ = 4186079782080.

The previous prime is 12712866021649. The next prime is 12712866021671. The reversal of 12712866021666 is 66612066821721.

12712866021666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12479305 + ... + 13459523.

It is an arithmetic number, because the mean of its divisors is an integer number (580825930230).

Almost surely, 2^{12712866021666} is an apocalyptic number.

12712866021666 is an abundant number, since it is smaller than the sum of its proper divisors (15166778629374).

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

12712866021666 is a wasteful number, since it uses less digits than its factorization.

12712866021666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988991 (or 988988 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 12712866021666 in words is "twelve trillion, seven hundred twelve billion, eight hundred sixty-six million, twenty-one thousand, six hundred sixty-six".