In any case, they're going to have to remake the film(s) again because they most likely got it wrong!
Until very recently our versions of Revelations came from Greek transcripts that were translations of the original hebrew. The oldest documents available were in too poor a condition to be used. The later Greek documents, dating from a time when Greece was dominated by Rome, gave the number of the beast as 666. Theologians believe that this was an attempt by Greeks to slur the name of Roman leaders, namely Nero. Nero written in Aramaic, was valued at 666, using the Hebrew numerology of gematria. Using 666 as the number of the devil was a manner of speaking against the emperor without the Roman authorities knowing.
In 2005 the oldest Greek documents, dating from before Roman authority extended across Greece, were finally deciphered. They give the number of the beast as 616.
As with all things translated multiple times, it's open to interpretation.