12660917 has 2 divisors, whose sum is σ = 12660918. Its totient is φ = 12660916.

The previous prime is 12660911. The next prime is 12660929. The reversal of 12660917 is 71906621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11566801 + 1094116 = 3401^2 + 1046^2 .

It is a cyclic number.

It is not a de Polignac number, because 12660917 - 2¹² = 12656821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12660911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330458 + 6330459.

It is an arithmetic number, because the mean of its divisors is an integer number (6330459).

Almost surely, 2^12660917 is an apocalyptic number.

It is an amenable number.

12660917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12660917 is an equidigital number, since it uses as much as digits as its factorization.

12660917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 12660917 is about 3558.2182338918. The cubic root of 12660917 is about 233.0710792739.

The spelling of 12660917 in words is "twelve million, six hundred sixty thousand, nine hundred seventeen".