13621166 has 16 divisors (see below), whose sum is σ = 22167600. Its totient is φ = 6239808.

The previous prime is 13621151. The next prime is 13621187. The reversal of 13621166 is 66112631.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1730 + ... + 5498.

It is an arithmetic number, because the mean of its divisors is an integer number (1385475).

Almost surely, 2^13621166 is an apocalyptic number.

13621166 is a deficient number, since it is larger than the sum of its proper divisors (8546434).

13621166 is a wasteful number, since it uses less digits than its factorization.

13621166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923.

The product of its digits is 1296, while the sum is 26.

The square root of 13621166 is about 3690.6863860263. The cubic root of 13621166 is about 238.8204039328.

Adding to 13621166 its reverse (66112631), we get a palindrome (79733797).

The spelling of 13621166 in words is "thirteen million, six hundred twenty-one thousand, one hundred sixty-six".