Divisor 16681

To determine if any number is divisible by 16681, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 7 and 2383 - then it is divisible by 16681.

The following tests must pass:

• Test if a number is divisible by 7
• The "Tobias hallingstad Test" for Divisibility by 2383

Easy!