Is the 2006 purple five dollar bill is it worth more than 5?

No. That's an urban legend that began because some people noticed that the new purple bills have the same series date (2006) as the old green and black bills, and they assumed that the new bills' date is incorrect.

However, that's a misunderstanding of the way American bills are dated. Current practice is to issue bills in a "series" that starts with the appointment of a new Secretary of the Treasury. All bills printed during their term carry the same date regardless of when they were actually issued. Henry Paulson was appointed in 2006, so a 2006 series was started. When the Treasury decided to change the $5 bill's color in 2008 Mr. Paulson was still in office so both the new and old bills are part of the 2006 series and carry that date.