13486666 has 4 divisors (see below), whose sum is σ = 20230002. Its totient is φ = 6743332.

The previous prime is 13486657. The next prime is 13486687. The reversal of 13486666 is 66668431.

13486666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66668431 = 139 ⋅479629.

It can be written as a sum of positive squares in only one way, i.e., 9765625 + 3721041 = 3125^2 + 1929^2 .

13486666 is a modest number, since divided by 6666 gives 1348 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3371665 + ... + 3371668.

Almost surely, 2^13486666 is an apocalyptic number.

13486666 is a deficient number, since it is larger than the sum of its proper divisors (6743336).

13486666 is an equidigital number, since it uses as much as digits as its factorization.

13486666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6743335.

The product of its digits is 124416, while the sum is 40.

The square root of 13486666 is about 3672.4196383311. The cubic root of 13486666 is about 238.0317378761.

The spelling of 13486666 in words is "thirteen million, four hundred eighty-six thousand, six hundred sixty-six".