12971766687 has 16 divisors (see below), whose sum is σ = 18875548800. Its totient is φ = 7858541600.

The previous prime is 12971766679. The next prime is 12971766737. The reversal of 12971766687 is 78666717921.

It is a cyclic number.

It is not a de Polignac number, because 12971766687 - 2³ = 12971766679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12971766687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12971766667) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 7012 + ... + 161222.

It is an arithmetic number, because the mean of its divisors is an integer number (1179721800).

Almost surely, 2^12971766687 is an apocalyptic number.

12971766687 is a deficient number, since it is larger than the sum of its proper divisors (5903782113).

12971766687 is a wasteful number, since it uses less digits than its factorization.

12971766687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156774.

The product of its digits is 10668672, while the sum is 60.

The spelling of 12971766687 in words is "twelve billion, nine hundred seventy-one million, seven hundred sixty-six thousand, six hundred eighty-seven".