Divisor 1664

To determine if any number is divisible by 1664, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 128 and 13 - then it is divisible by 1664.

The following tests must pass:

• Test if a number is divisible by 128
• Test if a number is divisible by 13

Easy!