There is much confusion in the world today about 666, the number of the beast. Some believe that 666 is the actual mark of the beast, in the form of a bar code or tattoo. Some even believe that the number isn't 666, but 616 or 606. But Revelation 13 is very clear that the number is "six hundred threescore and six". Which is six hundred and sixty six. So straight away we can discard the belief that the number of the beast is anything other than 666.
Now there is a very important point that the majority of people miss concerning the number 666, and that is the fact that 666 is a NUMBER that needs to be "calculated".
Revelation 13:18 ...'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.'
As you can see, it says that we need "wisdom" and that we need to "calculate" the NUMBER of the beast. So what does this mean? It means that 666 cannot just be three digits that would appear on a barcode or tattoo. Niether does it mean that the digits 666 that may appear in a date or phone number or licence place is evil. In of themselves, the three digits of 666 together are not evil. This is an actual number that needs to be calculated. So other numbers need to be added together to arrive at the number 666.
So to be able to calculate the number 666, we need to first find out who the beast is right? Because the number is the number of the beast. So logic tells us that we first need to know who the beast is. This is why we need "wisdom" to find out what this number is and who's number it is.