Step 1: Divide the number into separate digits:
60974 => 6 0 9 7 4
Step 2: Calculate the distance between each digit and the next (the last digit with the first):
6 to 0 = 6
0 to 9 = 9
9 to 7 = 2
7 to 4 = 3
4 to 6 = 2
Step 3: Combine the filters to a string:
6 9 2 3 2 = 69232