EDITOR'S NOTE: Look, we're not claiming this is the most mature site/page in the world, but... I speak around the country as an expert on Viral Marketing and I am fascinated by pop-culture phenomena; and, regardless of how juvenile it might be, the fact is that there are VERY few NUMBERS that can instantly elicit such a strong response from so many people!!!
[Another one is 666 - which some associate with Evil and/or the Devil.]
But the most incredible example is: 69! If you can get past your initial reaction and really stop and think about it, it really is an amazing phenomenon!