Well, let's look at some troubling information here.
CUTE PURPLE DINOSAUR.
1) In Latin they had no letter 'U'. So they used a 'V' instead. CVTE PVRPLE DINOSAVR
2) Now cross out all the letters that aren't roman numerals. So take out T, E, P, R, P, E, N, O, S, A, and R.
That leaves us with: CV VL DIV.
3) As a quick refresher, I = 1, V = 5, L = 50, C = 100, and D = 500
4) Lets do the math. 100 + 5 + 5 + 50 + 500 + 1 + 5. That equals 666. So there you go, mathematical proof that Barney the Dinosaur is Satan.