Step 1: Divide the number into separate digits:
89331 => 8 9 3 3 1
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
8 to 9 = 1
9 to 3 = 6
3 to 3 = 0
3 to 1 = 2
1 to 8 = 7
Step 3: Combine the filters to a string:
1 6 0 2 7 = 16027