Step 1: Divide the number into separate digits:
46474 => 4 6 4 7 4
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
4 to 6 = 2
6 to 4 = 2
4 to 7 = 3
7 to 4 = 3
4 to 4 = 0
Step 3: Combine the filters to a string:
2 2 3 3 0 = 22330