12665137514 has 4 divisors (see below), whose sum is σ = 18997706274. Its totient is φ = 6332568756.

The previous prime is 12665137489. The next prime is 12665137579. The reversal of 12665137514 is 41573156621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41573156621 = 113497 ⋅366293.

It can be written as a sum of positive squares in only one way, i.e., 10944298225 + 1720839289 = 104615^2 + 41483^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3166284377 + ... + 3166284380.

Almost surely, 2^12665137514 is an apocalyptic number.

12665137514 is a deficient number, since it is larger than the sum of its proper divisors (6332568760).

12665137514 is an equidigital number, since it uses as much as digits as its factorization.

12665137514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6332568759.

The product of its digits is 151200, while the sum is 41.

The spelling of 12665137514 in words is "twelve billion, six hundred sixty-five million, one hundred thirty-seven thousand, five hundred fourteen".