12999966666 has 16 divisors (see below), whose sum is σ = 27130365504. Its totient is φ = 4144916864.

The previous prime is 12999966659. The next prime is 12999966671. The reversal of 12999966666 is 66666999921.

It is a super-2 number, since 2×12999966666² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a self number, because there is not a number n which added to its sum of digits gives 12999966666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47101191 + ... + 47101466.

It is an arithmetic number, because the mean of its divisors is an integer number (1695647844).

Almost surely, 2^12999966666 is an apocalyptic number.

12999966666 is an abundant number, since it is smaller than the sum of its proper divisors (14130398838).

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

12999966666 is a wasteful number, since it uses less digits than its factorization.

12999966666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94202685.

The product of its digits is 102036672, while the sum is 69.

The spelling of 12999966666 in words is "twelve billion, nine hundred ninety-nine million, nine hundred sixty-six thousand, six hundred sixty-six".