Hexhexunium (Hhu)

Hexhexunium is the systematic name of the theoretical 661e element in the periodic table with a symbol of Hhu and atomic number of 661. Hexhexunium, also known as element 661, has zes­honderd­een­en­zestig protons in its nucleus, and zes­honderd­een­en­zestig electrons in its shells.