Perfect Square
665789466654111361 is a perfect square (815959231 × 815959231)
665789466654111361 is a perfect square (815959231 × 815959231)
665789466654111361 is odd
Previous odd number is 665789466654111359
Next odd number is 665789466654111363
1001 0011 1101 0101 1011 1111 1110 0000 1111 0001 1101 0111 0110 1000 0001