640045
6400452 = 409657602025, and 4096576 = 20242, 2025 = 452.
Page of Squares : First Upload June 15, 2013 ; Last Revised June 15, 2013by Yoshio Mimura, Kobe, Japan
642739
6427392 = 413113422121, a square every digit of which is non-zero and smaller than 5.
Page of Squares : First Upload September 28, 2013 ; Last Revised September 28, 2013by Yoshio Mimura, Kobe, Japan
643688
6436882 = 414334241344, a square every digit of which is non-zero and smaller than 5.
Page of Squares : First Upload September 28, 2013 ; Last Revised September 28, 2013by Yoshio Mimura, Kobe, Japan
643771
6437712 = 414441100441, a square with 3 kinds of digits.
Page of Squares : First Upload June 15, 2013 ; Last Revised June 15, 2013by Yoshio Mimura, Kobe, Japan
646416
646416 = 8042, a square with 3 kinds of digits.
Page of Squares : First Upload June 15, 2013 ; Last Revised June 15, 2013by Yoshio Mimura, Kobe, Japan
646625
6466252 = 418123890625, and 4 = 22, 18123890625 = 1346252.
Page of Squares : First Upload June 15, 2013 ; Last Revised June 15, 2013by Yoshio Mimura, Kobe, Japan
648025
648025 = 8052, a square with different digits.
Page of Squares : First Upload June 15, 2013 ; Last Revised June 15, 2013by Yoshio Mimura, Kobe, Japan
649110
6491102 = 20164*20165 + 20166*20167 + 20168*20169 + 20170*20171 + ... + 22052*22053.
Page of Squares : First Upload June 15, 2013 ; Last Revised June 15, 2013by Yoshio Mimura, Kobe, Japan
649788
6497882 = 422224444944, a square with 3 kinds of digitsa.
Page of Squares : First Upload June 15, 2013 ; Last Revised June 15, 2013by Yoshio Mimura, Kobe, Japan