12996664981 has 4 divisors (see below), whose sum is σ = 13680700000. Its totient is φ = 12312629964.

The previous prime is 12996664957. The next prime is 12996664987. The reversal of 12996664981 is 18946669921.

12996664981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12996664981 - 2⁹ = 12996664469 is a prime.

It is a super-2 number, since 2×12996664981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12996664987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342017481 + ... + 342017518.

It is an arithmetic number, because the mean of its divisors is an integer number (3420175000).

Almost surely, 2^12996664981 is an apocalyptic number.

It is an amenable number.

12996664981 is a deficient number, since it is larger than the sum of its proper divisors (684035019).

12996664981 is an equidigital number, since it uses as much as digits as its factorization.

12996664981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684035018.

The product of its digits is 10077696, while the sum is 61.

The spelling of 12996664981 in words is "twelve billion, nine hundred ninety-six million, six hundred sixty-four thousand, nine hundred eighty-one".