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That is always an important topic to extend the whole lifetime in wireless network environment. How to make use of the consumption of the limited energy in the sensor nodes? How many sensor nodes can establish an optimum cluster? This paper proposes an optimum nodes number on clustering-based routing protocol called CCC (coverage and connectivity method to cluster topology), which utilizes a node of its' optimum coverage and connectivity to transmit to another node and calculate the quantity of the nodes of an optimum cluster. In this article, the CCC, which is distributed the energy dissipation of sensor nodes and average energy savings. The performance of CCC is then compared to clustering-based schemes such as low-energy adaptive clustering hierarchy (LEACH). Simulation results show that CCC improves network lifetime and reduces whole average of energy consumption.