12666705 has 8 divisors (see below), whose sum is σ = 20266752. Its totient is φ = 6755568.

The previous prime is 12666701. The next prime is 12666727. The reversal of 12666705 is 50766621.

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

It is not a de Polignac number, because 12666705 - 2² = 12666701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12666701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422209 + ... + 422238.

It is an arithmetic number, because the mean of its divisors is an integer number (2533344).

Almost surely, 2^12666705 is an apocalyptic number.

12666705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12666705 is a deficient number, since it is larger than the sum of its proper divisors (7600047).

12666705 is an equidigital number, since it uses as much as digits as its factorization.

12666705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844455.

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

The square root of 12666705 is about 3559.0314693748. The cubic root of 12666705 is about 233.1065903903.

The spelling of 12666705 in words is "twelve million, six hundred sixty-six thousand, seven hundred five".