12666115 has 32 divisors (see below), whose sum is σ = 19160064. Its totient is φ = 7808640.

The previous prime is 12666083. The next prime is 12666131. The reversal of 12666115 is 51166621.

It is not a de Polignac number, because 12666115 - 2⁵ = 12666083 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, 64197 + ... + 64393.

It is an arithmetic number, because the mean of its divisors is an integer number (598752).

Almost surely, 2^12666115 is an apocalyptic number.

12666115 is a deficient number, since it is larger than the sum of its proper divisors (6493949).

12666115 is a wasteful number, since it uses less digits than its factorization.

12666115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387.

The product of its digits is 2160, while the sum is 28.

The square root of 12666115 is about 3558.9485806907. The cubic root of 12666115 is about 233.1029710585.

It can be divided in two parts, 1266 and 6115, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 12666115 in words is "twelve million, six hundred sixty-six thousand, one hundred fifteen".