The effects of intermolecular interactions of TeO2 molecules in the (TeO2)(n) oligomers on the polarizability (alpha) and second hyperpolarizability (gamma) are investigated by the use of a density functional method. A significant intermolecular distance dependence of both quantities is observed. The huge dissociation-induced polarizability enhancement is analyzed in terms of the molecular orbital evolution. It is shown that the obtained results can provide a new look at the microscopic origin of the extraordinary dielectric properties of TeO2 glass.