Numbers 870,000,000,000s

870,037,764,750

[Math.]  870,037,764,750 = 21×32×53×74×115.

871,287,128,712  & 879,999,999,912 (see below)

871,722,862,921

[Math.]    Sum of the first 1366 cube numbers:

13+…+13663 = 871,722,862,921 = (1+…+1366)2 = 933,6612.

874,277,360,784

[Math.]    Sum of the first 1367 cube numbers:

13+…+13673 = 874,277,360,784 = (1+…+1367)2 = 935,0282.

876,837,468,816

[Math.]    Sum of the first 1368 cube numbers:

13+…+13683 = 876,837,468,816 = (1+…+1368)2 = 936,3962.

878,565,817,885

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

878,565,817,885 = 686352+…+688202 = 688212+…+690052.

879,403,195,225

[Math.]    Sum of the first 1369 cube numbers:

13+…+13693 = 879,403,195,225 = (1+…+1369)2 = 937,7652.

879,999,999,912 & 871,287,128,712

[Math.]

(*)   8712 = 2178×4 & 8712×2178 = 18,974,736 = 43562

87128712 = 21782178×4 & 87128712×21782178 = 435643562

(**)   87912 = 21978×4 & 21978×87912 = 1,932,129,936 = 439562

8791287912 = 21978…21978×4 & 21978…21978×87912…87912 = 43956…439562

(***)   879999999912 = 219999999978×4 &

219999999978×879999999912 = 4399999999562

879999999912…879999999912 = 219999999978…219999999978×4 &

219999999978…219999999978×879999999912…879999999912 =

=  439999999956…4399999999562

(****)   879…912 = 219…978×4 & 219…978×879…912 = 439…9562

879…912…879…912 = 219…978…219…978×4 &

219…978…219…978×879…912…879…912 = 439…956…439…9562.