Electrical capacity of earth is approximately :

57.6 µF 1 F 711 µF 9 × 109 µF

711 µF

Capacity of a sphere is given by $C = 4\pi \epsilon_0 R$ For Earth $R= 6400 Km = 6400\times 10^3m$ $C = 4\pi \epsilon_0 R = \frac{6400\times 10^3}{9\times 10^9} = 711\mu F$