777! or 666!
On February 24th, 2009, another amazing event took place in the night skies over El Cajon, California. According to CBS News, it was witnessed and photographed by many people, and I have a copy of the photo. (40) Three large Arabic numerals appeared in blood red color and in a triangular shape in the sky. NASA has no certain explanation for it. These eerie numerals were the Arabic sitta, which is the number six. Thus, a clear and distinct 666 (looks like a 777 but in Arabic it is 666 *see below) in blood red appeared over California. These are the last of the last days! Source
* Modern-day Arab telephone keypad with two forms of Hindu-Arabic numerals: Western Arabic/European numerals on the left and Eastern Arabic numerals on the right
The Arab number six looks like a European "7" while the Arab number seven resembles a European letter "V".
Thanks to one of my readers for the above information - Wiki