Yeah it happens naturally with anything you use a lot.
When I was in high school I knew dozens of phone numbers. Today not so much (though I still remember the number we had at the house where I grew up, and a few others that were for my good friends).
> I still remember the number we had at the house where I grew up
One of my earliest memories is of my mother drilling my brother and I on our telephone number. She did a good job. I'll never forget it: AMherst 3-7004.