15660 is a `hidden beast` number, since 1 + 5 + 660 = 666.
15660 is an undulating number in base 12.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 15660.
215660 is an apocalyptic number.
15660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 15660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25200).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
15660 is a wasteful number, since it uses less digits than its factorization.
15660 is an evil number, because the sum of its binary digits is even.
The square root of 15660 is about 125.1399216877. The cubic root of 15660 is about 25.0186527462.
Subtracting from 15660 its reverse (6651), we obtain a palindrome (9009).
The spelling of 15660 in words is "fifteen thousand, six hundred sixty".