66 , 166 , 266 , 366 , 466 , 566 , 606 , 616 , 626 , 636 , 646 , 656 , 660 , 661 , 662 , 663 , 664 , 665 , 667 , 668 , 669 , 676 , 686 , 696 , 766 , 866 , 966 , >>Total permutations = 27 such integers
27 / 1000 - fraction of integers with exactly 2 sixes.
