12165667 has 2 divisors, whose sum is σ = 12165668. Its totient is φ = 12165666.

The previous prime is 12165661. The next prime is 12165679. The reversal of 12165667 is 76656121.

It is a happy number.

12165667 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (76656121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12165667 is a prime.

It is not a weakly prime, because it can be changed into another prime (12165661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082833 + 6082834.

It is an arithmetic number, because the mean of its divisors is an integer number (6082834).

Almost surely, 2^12165667 is an apocalyptic number.

12165667 is a deficient number, since it is larger than the sum of its proper divisors (1).

12165667 is an equidigital number, since it uses as much as digits as its factorization.

12165667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 12165667 is about 3487.9316220362. The cubic root of 12165667 is about 229.9916001973.

The spelling of 12165667 in words is "twelve million, one hundred sixty-five thousand, six hundred sixty-seven".