13705666 has 16 divisors (see below), whose sum is σ = 22292928. Its totient is φ = 6282000.

The previous prime is 13705633. The next prime is 13705667. The reversal of 13705666 is 66650731.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13705667) 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, 2181 + ... + 5671.

It is an arithmetic number, because the mean of its divisors is an integer number (1393308).

Almost surely, 2^13705666 is an apocalyptic number.

13705666 is a deficient number, since it is larger than the sum of its proper divisors (8587262).

13705666 is a wasteful number, since it uses less digits than its factorization.

13705666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 13705666 is about 3702.1164217242. The cubic root of 13705666 is about 239.3132334324.

The spelling of 13705666 in words is "thirteen million, seven hundred five thousand, six hundred sixty-six".