12666728822 has 32 divisors (see below), whose sum is σ = 21869222400. Its totient is φ = 5441839200.

The previous prime is 12666728813. The next prime is 12666728839. The reversal of 12666728822 is 22882766621.

It is a happy number.

It is a congruent number.

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, 145004 + ... + 215312.

It is an arithmetic number, because the mean of its divisors is an integer number (683413200).

Almost surely, 2^12666728822 is an apocalyptic number.

12666728822 is a deficient number, since it is larger than the sum of its proper divisors (9202493578).

12666728822 is a wasteful number, since it uses less digits than its factorization.

12666728822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70772.

The product of its digits is 1548288, while the sum is 50.

The spelling of 12666728822 in words is "twelve billion, six hundred sixty-six million, seven hundred twenty-eight thousand, eight hundred twenty-two".