Googology Wiki
Googology Wiki
220

There are exactly 220 yards in a furlong.

It is also approximately the number of imperial gallons in a cubic metre.

Furthermore, it is the mains voltage in many countries.

Since it is the 10th tetrahedral number, where 10 is the 3rd tetrahedral number, it also appears in the calculation of the tetrahedroogol.

Finally, it is part of the smallest amicable pair (namely, with 284).

In chess[]

It is also the number of possible bishop moves in 6×6 minichess.