12666131 has 2 divisors, whose sum is σ = 12666132. Its totient is φ = 12666130.

The previous prime is 12666083. The next prime is 12666133. The reversal of 12666131 is 13166621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12666131 - 2⁶ = 12666067 is a prime.

It is a super-2 number, since 2×12666131² = 320861749018322, which contains 22 as substring.

Together with 12666133, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12666131.

It is not a weakly prime, because it can be changed into another prime (12666133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6333065 + 6333066.

It is an arithmetic number, because the mean of its divisors is an integer number (6333066).

Almost surely, 2^12666131 is an apocalyptic number.

12666131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12666131 is an equidigital number, since it uses as much as digits as its factorization.

12666131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 12666131 is about 3558.9508285448. The cubic root of 12666131 is about 233.1030692113.

The spelling of 12666131 in words is "twelve million, six hundred sixty-six thousand, one hundred thirty-one".