12966991959 has 16 divisors (see below), whose sum is σ = 18379486080. Its totient is φ = 8108589600.

The previous prime is 12966991909. The next prime is 12966992039. The reversal of 12966991959 is 95919966921.

It is not a de Polignac number, because 12966991959 - 2⁸ = 12966991703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12966991959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12966991909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1120437 + ... + 1131950.

It is an arithmetic number, because the mean of its divisors is an integer number (1148717880).

Almost surely, 2^12966991959 is an apocalyptic number.

12966991959 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12966991959 is a deficient number, since it is larger than the sum of its proper divisors (5412494121).

12966991959 is a wasteful number, since it uses less digits than its factorization.

12966991959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252510.

The product of its digits is 21257640, while the sum is 66.

The spelling of 12966991959 in words is "twelve billion, nine hundred sixty-six million, nine hundred ninety-one thousand, nine hundred fifty-nine".