12566266 has 16 divisors (see below), whose sum is σ = 19206720. Its totient is φ = 6165280.

The previous prime is 12566261. The next prime is 12566291. The reversal of 12566266 is 66266521.

It is a super-2 number, since 2×12566266² = 315822082365512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12566261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40251 + ... + 40561.

It is an arithmetic number, because the mean of its divisors is an integer number (1200420).

Almost surely, 2^12566266 is an apocalyptic number.

12566266 is a deficient number, since it is larger than the sum of its proper divisors (6640454).

12566266 is a wasteful number, since it uses less digits than its factorization.

12566266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629.

The product of its digits is 25920, while the sum is 34.

The square root of 12566266 is about 3544.8929461974. The cubic root of 12566266 is about 232.4888251460.

The spelling of 12566266 in words is "twelve million, five hundred sixty-six thousand, two hundred sixty-six".