Perfect Square
665603010179231089 is a perfect square (815844967 × 815844967)
665603010179231089 is a perfect square (815844967 × 815844967)
665603010179231089 is odd
Previous odd number is 665603010179231087
Next odd number is 665603010179231091
1001 0011 1100 1011 0010 0110 1001 0100 0111 0010 1001 1110 1101 0111 0001