The Greek letters of Jesus' Name come to the numerological value of 888. The jota represents the value of 10, the eta 8, the sigma 200, the omicron 70 and the upsilon 400. Since there are two sigma's in Jesus' Name, this adds up to 888. As in the ancient manuscripts only capital letters, the so-called majuscules (later uncials), were used and no end sigma's, the total does come to 888 and not 694.
Jesus will be imitated by the antichrist who as the false prophet will represent the beast with the apocalyptic number of 666. Jesus is both King and High-priest and these two functions will be imitated by the two beasts of Revelation ch.13. Whereas Jesus stands for the new beginning and the ultimate measure of divine perfection, the beast will not arrive at anything more but an almost human perfection; 6 being the number of man. In this perfection he will pretend to be divine. Hence the triple six.
What began in human history with the usurper Nimrod will find its climax in the beast. The human being wants to deify himself. For most people this means that they identify with a führer, their star, pop idol, super athlete or whatever. But the Bible says that what is extraordinary ('high') with humans is an abomination with God.