There are 613 or Taryag Mitzvos in the Torah. There are another 7
Mitzvos MiDirabanan. That makes 620 or Kesser which means crown.
Hashem's crown is not complete without the mitzvos DiRabanan. In the
Aseres HaDibros which is the basis for the Taryag Mitzvos we find 620
letters. What are these seven Mitzvos MiDiRabbanan? Click here to see
a complete list on Revach lists.