13663386 has 48 divisors (see below), whose sum is σ = 32580288. Its totient is φ = 4104000.

The previous prime is 13663361. The next prime is 13663387. The reversal of 13663386 is 68336631.

13663386 is a `hidden beast` number, since 13 + 6 + 633 + 8 + 6 = 666.

13663386 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13663386.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13663387) 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, 29670 + ... + 30126.

It is an arithmetic number, because the mean of its divisors is an integer number (678756).

Almost surely, 2^13663386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13663386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16290144).

13663386 is an abundant number, since it is smaller than the sum of its proper divisors (18916902).

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

13663386 is a wasteful number, since it uses less digits than its factorization.

13663386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 624 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 13663386 is about 3696.4017638779. The cubic root of 13663386 is about 239.0668977020.

The spelling of 13663386 in words is "thirteen million, six hundred sixty-three thousand, three hundred eighty-six".