13675666 has 4 divisors (see below), whose sum is σ = 20513502. Its totient is φ = 6837832.

The previous prime is 13675657. The next prime is 13675679. The reversal of 13675666 is 66657631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13535041 + 140625 = 3679^2 + 375^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3418915 + ... + 3418918.

Almost surely, 2^13675666 is an apocalyptic number.

13675666 is a deficient number, since it is larger than the sum of its proper divisors (6837836).

13675666 is an equidigital number, since it uses as much as digits as its factorization.

13675666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6837835.

The product of its digits is 136080, while the sum is 40.

The square root of 13675666 is about 3698.0624656704. The cubic root of 13675666 is about 239.1384969001.

It can be divided in two parts, 13675 and 666, that added together give a palindrome (14341).

The spelling of 13675666 in words is "thirteen million, six hundred seventy-five thousand, six hundred sixty-six".