12660373997 has 4 divisors (see below), whose sum is σ = 12745343100. Its totient is φ = 12575404896.

The previous prime is 12660373939. The next prime is 12660374033. The reversal of 12660373997 is 79937306621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79937306621 = 29 ⋅2756458849.

It can be written as a sum of positive squares in 2 ways, for example, as 990109156 + 11670264841 = 31466^2 + 108029^2 .

It is a cyclic number.

It is not a de Polignac number, because 12660373997 - 2⁶ = 12660373933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12660376997) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 42484328 + ... + 42484625.

It is an arithmetic number, because the mean of its divisors is an integer number (3186335775).

Almost surely, 2^12660373997 is an apocalyptic number.

It is an amenable number.

12660373997 is a deficient number, since it is larger than the sum of its proper divisors (84969103).

12660373997 is an equidigital number, since it uses as much as digits as its factorization.

12660373997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84969102.

The product of its (nonzero) digits is 2571912, while the sum is 53.

The spelling of 12660373997 in words is "twelve billion, six hundred sixty million, three hundred seventy-three thousand, nine hundred ninety-seven".