According to Wikkipedia:
The Number of the Beast is a concept from the Book of Revelation of the New Testament of the Christian Bible. The Number is 666 in modern texts, although 616 and 665 appear instead in at least one ancient source. This topic is a source of contention for many church groups and theologians. Some scholars contend that the number is a code for the Roman Emperor Nero, a view that is supported by the Roman Catholic Church.
From the King James translation: Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.
In the Greek manuscripts, the Number is rendered in Greek numerical form as “χξς”, or sometimes literally as “six hundred and sixty-six”, “ἑξακόσιοι ἑξήκοντα ἑξι”. [hexakosioi hexékonta hex - lit. six hundred sixty six]
The oldest known record of the verse, a fragment of an early manuscript of Revelation from the Oxyrhynchus site, gives a different number, 616, as “χιϛ”. The early Church father Irenaeus knew several occurrences of the 616-variant but regarded them as a scribal error, although he didn't know the meaning of the number. The Zürich Bible which is based on the oldest Bible manuscripts also mentions the number 616.
and:
The A666 is a major road in east Lancashire, England. Also known as the Bolton Road, it runs from Pendlebury near Manchester, through Bolton, Darwen and Blackburn before meeting the A59 at Langho. Along the route are the West Pennine Moors, the Turton and Entwistle reservoir and the Entwistle reservoir forest.
It is commonly known as "The Devil's Highway" or "The Devil Road" due to its 'satanic' numbering.
(Gonna get my kicks, on the A666
!)
