13666212 has 48 divisors (see below), whose sum is σ = 40494720. Its totient is φ = 3904416.

The previous prime is 13666193. The next prime is 13666223. The reversal of 13666212 is 21266631.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8283 + ... + 9794.

It is an arithmetic number, because the mean of its divisors is an integer number (843640).

Almost surely, 2^13666212 is an apocalyptic number.

13666212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13666212 is an abundant number, since it is smaller than the sum of its proper divisors (26828508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13666212 is a wasteful number, since it uses less digits than its factorization.

13666212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18097 (or 18089 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 13666212 is about 3696.7840077559. The cubic root of 13666212 is about 239.0833786456.

The spelling of 13666212 in words is "thirteen million, six hundred sixty-six thousand, two hundred twelve".