12660667 has 2 divisors, whose sum is σ = 12660668. Its totient is φ = 12660666.

The previous prime is 12660647. The next prime is 12660671. The reversal of 12660667 is 76606621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12660667 - 2¹¹ = 12658619 is a prime.

It is not a weakly prime, because it can be changed into another prime (12660647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330333 + 6330334.

It is an arithmetic number, because the mean of its divisors is an integer number (6330334).

Almost surely, 2^12660667 is an apocalyptic number.

12660667 is a deficient number, since it is larger than the sum of its proper divisors (1).

12660667 is an equidigital number, since it uses as much as digits as its factorization.

12660667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 12660667 is about 3558.1831037764. The cubic root of 12660667 is about 233.0695452051.

The spelling of 12660667 in words is "twelve million, six hundred sixty thousand, six hundred sixty-seven".