12805666 has 8 divisors (see below), whose sum is σ = 19828224. Its totient is φ = 6196260.

The previous prime is 12805627. The next prime is 12805673. The reversal of 12805666 is 66650821.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103210 + ... + 103333.

It is an arithmetic number, because the mean of its divisors is an integer number (2478528).

Almost surely, 2^12805666 is an apocalyptic number.

12805666 is a deficient number, since it is larger than the sum of its proper divisors (7022558).

12805666 is a wasteful number, since it uses less digits than its factorization.

12805666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206576.

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

The square root of 12805666 is about 3578.5005239625. The cubic root of 12805666 is about 233.9559295582.

The spelling of 12805666 in words is "twelve million, eight hundred five thousand, six hundred sixty-six".