Step 1: Divide the number into separate digits:
06268 => 0 6 2 6 8
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
0 to 6 = 6
6 to 2 = 4
2 to 6 = 4
6 to 8 = 2
8 to 0 = 8
Step 3: Combine the filters to a string:
6 4 4 2 8 = 64428