12786066881 has 16 divisors (see below), whose sum is σ = 14682470400. Its totient is φ = 10907197440.

The previous prime is 12786066871. The next prime is 12786066893. The reversal of 12786066881 is 18866068721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12786066881 is a prime.

It is a super-2 number, since 2×12786066881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12786066841) 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, 2661920 + ... + 2666718.

It is an arithmetic number, because the mean of its divisors is an integer number (917654400).

Almost surely, 2^12786066881 is an apocalyptic number.

It is an amenable number.

12786066881 is a deficient number, since it is larger than the sum of its proper divisors (1896403519).

12786066881 is a wasteful number, since it uses less digits than its factorization.

12786066881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6544.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The spelling of 12786066881 in words is "twelve billion, seven hundred eighty-six million, sixty-six thousand, eight hundred eighty-one".