Numbers 720,000,000,000s

721,745,397,136

[Math.]  Sum of the first 1303 cube numbers:

13+…+13033 = 721,745,397,136 = (1+…+1303)2 = 849,5562.

 

723,962,739,600   

[Math.]  Sum of the first 1304 cube numbers:

13+…+13043 = 723,962,739,600 = (1+…+1304)2 = 850,8602.

 

724,845,445,205

[Math.]  Two consecutive sums of consecutive square numbers:

724,845,445,205 = 635462+…+637242 = 637252+…+646192.

 

725,650,126,201   

[Math.]  21,948,126,201 = (21948+126,201)2 = 148,1492 and

725,650,126,201 = (725650+126201)2 = 851,8512 and

149,149+851851 = 1,000,000.

 

726,185,187,225   

[Math.]  Sum of the first 1305 cube numbers:

13+…+13053 = 726,185,187,225 = (1+…+1305)2 = 852,1652.

 

728,412,747,841   

[Math.]  Sum of the first 1306 cube numbers:

13+…+13063 = 728,412,747,841 = (1+…+1306)2 = 853,4712.