13406666 has 32 divisors (see below), whose sum is σ = 26060160. Its totient is φ = 5023296.

The previous prime is 13406651. The next prime is 13406711. The reversal of 13406666 is 66660431.

13406666 is a modest number, since divided by 6666 gives 1340 as remainder.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1520 + ... + 5396.

It is an arithmetic number, because the mean of its divisors is an integer number (814380).

Almost surely, 2^13406666 is an apocalyptic number.

13406666 is a deficient number, since it is larger than the sum of its proper divisors (12653494).

13406666 is a wasteful number, since it uses less digits than its factorization.

13406666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 13406666 is about 3661.5114365519. The cubic root of 13406666 is about 237.5601531844.

The spelling of 13406666 in words is "thirteen million, four hundred six thousand, six hundred sixty-six".