[en] In this paper, the finite-size Dicke model of arbitrary number of qubits is solved analytically in a unified way within extended coherent states. For the $N=2k$ or $2k-<!--\; ???\; -->1$ Dicke models (k is an integer), the G-function, which is only an energy dependent $k\times <!--\; ??\; -->k$ determinant, is derived in a transparent manner. The regular spectrum is completely and uniquely given by stable zeros of the G-function. The closed-form exceptional eigenvalues are also derived. The level distribution controlled by the pole structure of the G-functions suggests non-integrability for $N><!--\; >\; -->1$ model at any finite coupling in the sense of recent criteria found in the literature. A preliminary application to the exact dynamics of genuine multipartite entanglement in the finite-N Dicke model is presented using the obtained exact solutions. (paper)