12666955 has 32 divisors (see below), whose sum is σ = 18748800. Its totient is φ = 8017920.

The previous prime is 12666943. The next prime is 12666967. The reversal of 12666955 is 55966621.

It is an interprime number because it is at equal distance from previous prime (12666943) and next prime (12666967).

It is not a de Polignac number, because 12666955 - 2¹¹ = 12664907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36121 + ... + 36469.

It is an arithmetic number, because the mean of its divisors is an integer number (585900).

Almost surely, 2^12666955 is an apocalyptic number.

12666955 is a deficient number, since it is larger than the sum of its proper divisors (6081845).

12666955 is a wasteful number, since it uses less digits than its factorization.

12666955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439.

The product of its digits is 97200, while the sum is 40.

The square root of 12666955 is about 3559.0665911163. The cubic root of 12666955 is about 233.1081239715.

It can be divided in two parts, 126 and 66955, that added together give a square (67081 = 259²).

The spelling of 12666955 in words is "twelve million, six hundred sixty-six thousand, nine hundred fifty-five".