What are the root permissions for a file?

If I type:

ls -l file.txt

I see that the rights for that file are equivalent to "456":

• 4 = owner (r--)


• 5 = group (r-x)


• 6 = others (rw-)

Which the rights for root in this case? Does it have 777?

Could the rights be changed so that the root will have less permissions than the owner?