13103666 has 4 divisors (see below), whose sum is σ = 19655502. Its totient is φ = 6551832.

The previous prime is 13103627. The next prime is 13103677. The reversal of 13103666 is 66630131.

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., 12145225 + 958441 = 3485^2 + 979^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275915 + ... + 3275918.

Almost surely, 2^13103666 is an apocalyptic number.

13103666 is a deficient number, since it is larger than the sum of its proper divisors (6551836).

13103666 is an equidigital number, since it uses as much as digits as its factorization.

13103666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6551835.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 13103666 is about 3619.8986173649. The cubic root of 13103666 is about 235.7568236317.

Adding to 13103666 its reverse (66630131), we get a palindrome (79733797).

The spelling of 13103666 in words is "thirteen million, one hundred three thousand, six hundred sixty-six".