12866617 has 2 divisors, whose sum is σ = 12866618. Its totient is φ = 12866616.

The previous prime is 12866611. The next prime is 12866627. The reversal of 12866617 is 71666821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12313081 + 553536 = 3509^2 + 744^2 .

It is a cyclic number.

It is not a de Polignac number, because 12866617 - 2¹¹ = 12864569 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12866611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6433308 + 6433309.

It is an arithmetic number, because the mean of its divisors is an integer number (6433309).

Almost surely, 2^12866617 is an apocalyptic number.

It is an amenable number.

12866617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12866617 is an equidigital number, since it uses as much as digits as its factorization.

12866617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 12866617 is about 3587.0066908217. The cubic root of 12866617 is about 234.3265280975.

The spelling of 12866617 in words is "twelve million, eight hundred sixty-six thousand, six hundred seventeen".