They weren't built in the order of the last 6 digits of the vin. Although say a 333705 will definitely be after say a 325555 but at any point in time the last 6 digits would be in a range of about 3000.
For 333705 the best way to work out how many were built after it is to look at the GA (General Assembly) SEQUENCE number or SEQ number. They were built in this order. It can be found on numerous little white stickers under the car, on places like the struts, diff centre, underside of front bumpers in the middle, front struts etc there are perhaps 20 stickers on a car in various places. The last SEQ numbers were a bit over 4200 (the last car had the sequence number LAST). So if yours has a SEQ number of 1000, then there were about 3200 cars built after it