Step 1: Divide the number into separate digits:
37630 => 3 7 6 3 0
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
3 to 7 = 4
7 to 6 = 1
6 to 3 = 3
3 to 0 = 3
0 to 3 = 3
Step 3: Combine the filters to a string:
4 1 3 3 3 = 41333