The word ''666'' was used in the Bible in the book of Revelation to allude to Nero, the Roman tyrant who persecuted the Christians, and was later expanded to refer to demons, Satan, and anti-Christians in general.The number 666 was first recorded in the Bible, in Revelation 13:18, which reads: ''Herein is intelligence: whosoever is wise, let him count the number of the beast: for this is the number of a man, and his number is six hundred and sixty-six.'' '

Why 666? God created the world in seven days, seven means holy, blessed and complete, and the lack of one is repeated three times, which means very incomplete, which makes it "666".

Expanded Information

Because of cultural differences between China and the West, some numbers that mean good luck in China are considered evil in the eyes of Westerners.

Thirteen in China is an auspicious, noble number: 13 in Buddhism is the number of great good fortune, Buddhism was introduced to the Chinese sect for the thirteen sects, on behalf of the completion of the merit: such as the 13th floor of the Potala Palace, the 13th floor of the Tannin pagoda, and so on. Zhouyi 81 numerology and spirituality, 13 is also the number of great luck. 13 is the number of the emperor, is the emperor's exclusive, the emperor's belt of jade enumeration of the system, thirteen, 13 is the number of China's emperor, symbolized by a kind of right, a kind of emperor's rights.

The Western world, however, because of the religious influence, very avoid this number. Legend has it that before Jesus was victimized and his disciples **** into the Last Supper, the 13th person attending the supper was Judas, a disciple of Jesus. Judas betrayed Jesus to the Jewish authorities for 30 silver dollars, causing Jesus to be tortured. There were 13 people at the Last Supper, and the date of the Supper fell on the 13th day of the month. Since then, "13" has been recognized as a symbol of misfortune, synonymous with betrayal and treachery.

Westerners go to great lengths to avoid contact with 13. In the Netherlands, you'd be hard-pressed to find a building number 13 or a door number 13, which has been replaced by "12A". In English theaters, you won't find 13 rows and 13 seats. The French are smart, and there is usually a walkway between rows 12 and 14 in the theater. It is also taboo to travel on the 13th, and even more so to dine with 13 people, and a 13-course meal is even more unacceptable. If the thirteenth day of a month if the Friday with the weight of the very unlucky omen, called: Black Friday.