Perfect Square
665416625497794361 is a perfect square (815730731 × 815730731)
665416625497794361 is a perfect square (815730731 × 815730731)
665416625497794361 is odd
Previous odd number is 665416625497794359
Next odd number is 665416625497794363
1001 0011 1100 0000 1000 1110 0101 0011 0110 0110 1111 0110 0111 0011 1001