12665736551 has 16 divisors (see below), whose sum is σ = 13699445760. Its totient is φ = 11640609120.

The previous prime is 12665736527. The next prime is 12665736553. The reversal of 12665736551 is 15563756621.

It is a cyclic number.

It is not a de Polignac number, because 12665736551 - 2⁶ = 12665736487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12665736496 and 12665736505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665736553) 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 15 ways as a sum of consecutive naturals, for example, 6399080 + ... + 6401058.

It is an arithmetic number, because the mean of its divisors is an integer number (856215360).

Almost surely, 2^12665736551 is an apocalyptic number.

12665736551 is a deficient number, since it is larger than the sum of its proper divisors (1033709209).

12665736551 is a wasteful number, since it uses less digits than its factorization.

12665736551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886.

The product of its digits is 1134000, while the sum is 47.

The spelling of 12665736551 in words is "twelve billion, six hundred sixty-five million, seven hundred thirty-six thousand, five hundred fifty-one".