Offensive to Followers of Satan.
Kinda outdated, and a little techy, but still funny!

666 - Number of the Beast
660 - Approximate number of the Beast
DCLXVI - Roman numeral of the Beast
666.0000 - Number of the High Precision Beast
0.666 - Number of the Millibeast
/ 666 - The Beast Common Denominator
(-666) ^ (1/2) - Imaginary number of the Beast
6.66 e3 - Floating point Beast
1010011010 - Binary of the Beast
6, uh... what was that number? - Number of the Blonde Beast
1-666 - Area code of the Beast
00666 - Zip code of the Beast
666mph - The speed limit of the Beast
$665.95 - Retail price of the Beast
$699.25 - Price of the Beast plus 5% state sales tax
$769.95 - Price of the Beast with all accessories and replacement soul
$656.66 - Wal-Mart price of the Beast
$646.66 - Next week’s Wal-Mart price of the Beast
666 F - Oven temperature for roast Beast
666k - Retirement plan of the Beast
666 mg - Recommended Minimum Daily Requirement of Beast
6.66% - 5 year CD interest rate at First Beast of Hell National Bank
$666/hr - Beast’s lawyer’s billing rate
Lotus 6-6-6 - Spreadsheet of the Beast
Word 6.66 - Word Processor of the Beast
i66686 - CPU of the Beast
665.9997856 - The Number of the Beast on a Pentium
666i - BMW of the Beast
668 - Next-door neighbor of the Beast
333 - The semi-Christ