How many Roman army men were in a Roman century?

Chain of command for a legion: (Note: A legion was usually comprised of 10 Cohorts, each cohort was made of about 6 centuries, each century had 80 men plus the centurion)

Legatus: Commander of the Legion, in charge of about 5,280 men.

Primus Pilus: Supreme Centurion of a Legion, Senior Centurion of the First Cohort, in charge of about 960 men.

Senior Centurion: Commander of a Cohort, in charge of about 480 men.

Primi Ordine: A Centurion in Command of a Century in the First Cohort, in charge of about 80 men.

Junior Centurion: Commander of a Century, in charge of about 80 men.

File Leader: Basically the leader of a file in a Century, not necessarily a Commander, but just a soldier who did have slight authority of about 10 men in a file.