In the Bible (Leviticus 23) we read about the appointed God’s feasts, seasons during which God wants to be celebrated. We count days and on the seventh we rest. Well, man has seemingly changed that, but only seemingly, the count remains the same. Seven days, seven weeks, seven months, seven years and seven generations. This irregular number has no rhythm for if it had it would work like a mathematically calibrated machine. The seventh stops the rhythm. In Hebrew number seven is SHEVA and to sit and repose is SHEV; therefore seven means rest.
The Big Bang theory is very interesting, but it would have to have the count of sevens in its creative character, therefore it could never be accidental.