12771166 has 4 divisors (see below), whose sum is σ = 19156752. Its totient is φ = 6385582.

The previous prime is 12771151. The next prime is 12771191. The reversal of 12771166 is 66117721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66117721 = 593 ⋅111497.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3192790 + ... + 3192793.

It is an arithmetic number, because the mean of its divisors is an integer number (4789188).

Almost surely, 2^12771166 is an apocalyptic number.

12771166 is a deficient number, since it is larger than the sum of its proper divisors (6385586).

12771166 is an equidigital number, since it uses as much as digits as its factorization.

12771166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6385585.

The product of its digits is 3528, while the sum is 31.

The square root of 12771166 is about 3573.6768180685. The cubic root of 12771166 is about 233.7456388178.

Adding to 12771166 its reverse (66117721), we get a palindrome (78888887).

The spelling of 12771166 in words is "twelve million, seven hundred seventy-one thousand, one hundred sixty-six".