12665069 has 2 divisors, whose sum is σ = 12665070. Its totient is φ = 12665068.

The previous prime is 12665041. The next prime is 12665071. The reversal of 12665069 is 96056621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8094025 + 4571044 = 2845^2 + 2138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12665069 is a prime.

It is a super-2 number, since 2×12665069² = 320807945549522, which contains 22 as substring.

Together with 12665071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12665669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332534 + 6332535.

It is an arithmetic number, because the mean of its divisors is an integer number (6332535).

Almost surely, 2^12665069 is an apocalyptic number.

It is an amenable number.

12665069 is a deficient number, since it is larger than the sum of its proper divisors (1).

12665069 is an equidigital number, since it uses as much as digits as its factorization.

12665069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 12665069 is about 3558.8016241426. The cubic root of 12665069 is about 233.0965541364.

The spelling of 12665069 in words is "twelve million, six hundred sixty-five thousand, sixty-nine".