13668166 has 4 divisors (see below), whose sum is σ = 20502252. Its totient is φ = 6834082.

The previous prime is 13668131. The next prime is 13668167. The reversal of 13668166 is 66186631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66186631 = 7 ⋅9455233.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13668167) by changing a digit.

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 as a sum of consecutive naturals, namely, 3417040 + ... + 3417043.

It is an arithmetic number, because the mean of its divisors is an integer number (5125563).

Almost surely, 2^13668166 is an apocalyptic number.

13668166 is a deficient number, since it is larger than the sum of its proper divisors (6834086).

13668166 is an equidigital number, since it uses as much as digits as its factorization.

13668166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6834085.

The product of its digits is 31104, while the sum is 37.

The square root of 13668166 is about 3697.0482820759. The cubic root of 13668166 is about 239.0947728456.

The spelling of 13668166 in words is "thirteen million, six hundred sixty-eight thousand, one hundred sixty-six".