Is the crust thicker than the inner layers?

No, the Earth's crust is not thicker than the inner layers. The crust is the outermost layer, averaging about 5 to 70 kilometers thick, depending on whether it's oceanic or continental. In contrast, the inner layers, such as the mantle and the core, are significantly thicker, with the mantle extending to about 2,900 kilometers and the outer and inner cores reaching depths of around 3,500 kilometers total.