Colombia , officially the Republic of Colombia (Spanish: República de Colombia [reˈpuβlika ðe koˈlombja]), is a unitary constitutional republic comprising thirty-two departments. The country is located in northwestern South America, bordered to the northwest by Panama; to the north by the Caribbean Sea; to the east by Venezuela and Brazil; to the south by Ecuador and Peru; and to the west by the Pacific Ocean. Colombia is the 26th largest country by area and the fourth largest in South America after Brazil, Argentina and Peru. With over 46 million people, Colombia is the 27th largest country in the world by population and has the second largest population of any Spanish-speaking country in the world, after Mexico. Colombia is a middle power, with the fourth largest economy in Latin America, and the third largest in South America. Colombia is famous for the production of coffee, flowers, emeralds, coal, and oil. All of these products make up the primary sector of economy.