Static polarizabilities, [small alpha], and static second hyperpolarizabilities, [gamma], of the rare gas atoms, He-Rn, are investigated employing CCSD(T) calculations and large basis sets. For the lighter atoms, He-Kr, x-aug-cc-pVXZ basis sets were employed in order to test convergence (x = s-5; X = D-6). Further basis sets were employed for He in order to investigate basis set requirements. For the heavier species, effective core potentials (ECPs) are employed, together with a large, flexible valence space. [small alpha] and [gamma] were obtained by fitting the energies to standard expressions.