12806665 has 8 divisors (see below), whose sum is σ = 16176960. Its totient is φ = 9706032.

The previous prime is 12806657. The next prime is 12806683. The reversal of 12806665 is 56660821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12806665 - 2³ = 12806657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12806665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67309 + ... + 67498.

It is an arithmetic number, because the mean of its divisors is an integer number (2022120).

Almost surely, 2^12806665 is an apocalyptic number.

It is an amenable number.

12806665 is a deficient number, since it is larger than the sum of its proper divisors (3370295).

12806665 is a wasteful number, since it uses less digits than its factorization.

12806665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134831.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 12806665 is about 3578.6401048443. The cubic root of 12806665 is about 233.9620132166.

The spelling of 12806665 in words is "twelve million, eight hundred six thousand, six hundred sixty-five".