12660251335666 has 32 divisors (see below), whose sum is σ = 21300676209792. Its totient is φ = 5592815602560.

The previous prime is 12660251335609. The next prime is 12660251335733. The reversal of 12660251335666 is 66653315206621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8045251 + ... + 9489286.

It is an arithmetic number, because the mean of its divisors is an integer number (665646131556).

Almost surely, 2^{12660251335666} is an apocalyptic number.

12660251335666 is a deficient number, since it is larger than the sum of its proper divisors (8640424874126).

12660251335666 is a wasteful number, since it uses less digits than its factorization.

12660251335666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17535474.

The product of its (nonzero) digits is 6998400, while the sum is 52.

The spelling of 12660251335666 in words is "twelve trillion, six hundred sixty billion, two hundred fifty-one million, three hundred thirty-five thousand, six hundred sixty-six".