12666376605 has 16 divisors (see below), whose sum is σ = 20267827200. Its totient is φ = 6754859328.

The previous prime is 12666376579. The next prime is 12666376627. The reversal of 12666376605 is 50667366621.

It is not a de Polignac number, because 12666376605 - 2¹³ = 12666368413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221796 + ... + 272994.

It is an arithmetic number, because the mean of its divisors is an integer number (1266739200).

Almost surely, 2^12666376605 is an apocalyptic number.

12666376605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12666376605 is a deficient number, since it is larger than the sum of its proper divisors (7601450595).

12666376605 is a wasteful number, since it uses less digits than its factorization.

12666376605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67700.

The product of its (nonzero) digits is 1632960, while the sum is 48.

The spelling of 12666376605 in words is "twelve billion, six hundred sixty-six million, three hundred seventy-six thousand, six hundred five".