12666777695 has 64 divisors (see below), whose sum is σ = 18760992768. Its totient is φ = 8078400000.

The previous prime is 12666777547. The next prime is 12666777713. The reversal of 12666777695 is 59677766621.

It is not a de Polignac number, because 12666777695 - 2⁸ = 12666777439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2480645 + ... + 2485745.

It is an arithmetic number, because the mean of its divisors is an integer number (293140512).

Almost surely, 2^12666777695 is an apocalyptic number.

12666777695 is a deficient number, since it is larger than the sum of its proper divisors (6094215073).

12666777695 is a wasteful number, since it uses less digits than its factorization.

12666777695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5304.

The product of its digits is 40007520, while the sum is 62.

The spelling of 12666777695 in words is "twelve billion, six hundred sixty-six million, seven hundred seventy-seven thousand, six hundred ninety-five".