12670665 has 24 divisors (see below), whose sum is σ = 23584320. Its totient is φ = 5791968.

The previous prime is 12670649. The next prime is 12670667. The reversal of 12670665 is 56607621.

It is not a de Polignac number, because 12670665 - 2⁴ = 12670649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12670667) 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 in 23 ways as a sum of consecutive naturals, for example, 7885 + ... + 9354.

It is an arithmetic number, because the mean of its divisors is an integer number (982680).

Almost surely, 2^12670665 is an apocalyptic number.

12670665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12670665 is a deficient number, since it is larger than the sum of its proper divisors (10913655).

12670665 is a wasteful number, since it uses less digits than its factorization.

12670665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17261 (or 17254 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 12670665 is about 3559.5877570303. The cubic root of 12670665 is about 233.1308799462.

The spelling of 12670665 in words is "twelve million, six hundred seventy thousand, six hundred sixty-five".