12666819759 has 32 divisors (see below), whose sum is σ = 19067320320. Its totient is φ = 7410268800.

The previous prime is 12666819749. The next prime is 12666819761. The reversal of 12666819759 is 95791866621.

It is not a de Polignac number, because 12666819759 - 2⁵ = 12666819727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666819719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 390537 + ... + 421725.

It is an arithmetic number, because the mean of its divisors is an integer number (595853760).

Almost surely, 2^12666819759 is an apocalyptic number.

12666819759 is a deficient number, since it is larger than the sum of its proper divisors (6400500561).

12666819759 is a wasteful number, since it uses less digits than its factorization.

12666819759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31631.

The product of its digits is 9797760, while the sum is 60.

The spelling of 12666819759 in words is "twelve billion, six hundred sixty-six million, eight hundred nineteen thousand, seven hundred fifty-nine".