Perfect Square
665603036286270289 is a perfect square (815844983 × 815844983)
665603036286270289 is a perfect square (815844983 × 815844983)
665603036286270289 is odd
Previous odd number is 665603036286270287
Next odd number is 665603036286270291
1001 0011 1100 1011 0010 0110 1111 0101 1011 0100 0011 1011 1011 0101 0001