12971766686 has 16 divisors (see below), whose sum is σ = 19753009920. Its totient is φ = 6387478680.

The previous prime is 12971766679. The next prime is 12971766737. The reversal of 12971766686 is 68666717921.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665621 + ... + 684831.

It is an arithmetic number, because the mean of its divisors is an integer number (1234563120).

Almost surely, 2^12971766686 is an apocalyptic number.

12971766686 is a deficient number, since it is larger than the sum of its proper divisors (6781243234).

12971766686 is a wasteful number, since it uses less digits than its factorization.

12971766686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24319.

The product of its digits is 9144576, while the sum is 59.

The spelling of 12971766686 in words is "twelve billion, nine hundred seventy-one million, seven hundred sixty-six thousand, six hundred eighty-six".