Have you noticed that you see the repeating number 666 a lot? You look out the car window to see 666 on a license plate. Your eyes get wide and you wonder, Is that a bad omen? What did that mean?

Add Yahoo as a preferred source to see more of our stories on Google. We know, this number gets a really bad rep, but fret not—it doesn’t mean anything bad is going to happen to you. So, what does 666 ...