13666224 has 120 divisors (see below), whose sum is σ = 42021616. Its totient is φ = 3801600.

The previous prime is 13666223. The next prime is 13666231. The reversal of 13666224 is 42266631.

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

It is a junction number, because it is equal to n+sod(n) for n = 13666191 and 13666200.

It is not an unprimeable number, because it can be changed into a prime (13666223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75414 + ... + 75594.

Almost surely, 2^13666224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13666224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21010808).

13666224 is an abundant number, since it is smaller than the sum of its proper divisors (28355392).

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

13666224 is a wasteful number, since it uses less digits than its factorization.

13666224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 210 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 13666224 is about 3696.7856307879. The cubic root of 13666224 is about 239.0834486235.

The spelling of 13666224 in words is "thirteen million, six hundred sixty-six thousand, two hundred twenty-four".