12666251 has 8 divisors (see below), whose sum is σ = 13668480. Its totient is φ = 11668032.

The previous prime is 12666239. The next prime is 12666263. The reversal of 12666251 is 15266621.

It is an interprime number because it is at equal distance from previous prime (12666239) and next prime (12666263).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12666251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12666211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10655 + ... + 11783.

It is an arithmetic number, because the mean of its divisors is an integer number (1708560).

Almost surely, 2^12666251 is an apocalyptic number.

12666251 is a deficient number, since it is larger than the sum of its proper divisors (1002229).

12666251 is a wasteful number, since it uses less digits than its factorization.

12666251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005.

The product of its digits is 4320, while the sum is 29.

The square root of 12666251 is about 3558.9676874060. The cubic root of 12666251 is about 233.1038053551.

The spelling of 12666251 in words is "twelve million, six hundred sixty-six thousand, two hundred fifty-one".