12366643 has 2 divisors, whose sum is σ = 12366644. Its totient is φ = 12366642.

The previous prime is 12366637. The next prime is 12366703. The reversal of 12366643 is 34666321.

It is a weak prime.

It is an emirp because it is prime and its reverse (34666321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12366643 - 2²¹ = 10269491 is a prime.

It is not a weakly prime, because it can be changed into another prime (12366623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6183321 + 6183322.

It is an arithmetic number, because the mean of its divisors is an integer number (6183322).

Almost surely, 2^12366643 is an apocalyptic number.

12366643 is a deficient number, since it is larger than the sum of its proper divisors (1).

12366643 is an equidigital number, since it uses as much as digits as its factorization.

12366643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 12366643 is about 3516.6238070058. The cubic root of 12366643 is about 231.2511713600.

It can be divided in two parts, 123 and 66643, that added together give a palindrome (66766).

The spelling of 12366643 in words is "twelve million, three hundred sixty-six thousand, six hundred forty-three".