JAKARTA, Feb 19 (Reuters) - Indonesia's investment minister and miners Freeport-McMoran and its Indonesia unit Freeport Indonesia have signed a memorandum of understanding to extend Freeport Indonesia's mining permit beyond 2041, Freeport-McMoran chairman Richard Adkerson said.

Adkerson was speaking at a U.S. Chamber of Commerce event in Washington on Wednesday evening that was attended by Indonesian President Prabowo Subianto.

- Prabowo has travelled to Washington for a meeting of U.S. President Donald Trump's Board of Peace, and to seek a lower tariff rate in a trade deal with the United States.

- "We would like the best of relationships with the United States in all spheres - politically, economically," Prabowo said in a speech at the Chamber of Commerce event.

(Reporting by Stanley Widianto; editing by John Mair)