MOSCOW, April 11. 2018 /TASS/ http://tass.com/defense/999002:
"Russia’s United Shipbuilding Corporation (USC) will demonstrate five projects of conventional submarines of various classes and water displacement, including a submarine equipped with the air-independent propulsion system, at the Defexpo India 2018 arms show, the USC press office told TASS on Wednesday.
The land, naval and internal homeland security systems exhibition Defexpo India runs in Chennai, India, on April 11-14.
"The Project 636 submarine with the Club-S missile system, the conventional submarine Amur-1650 with the air-independent propulsion power plant, the P-650 small coastal submarine, the Piranya-T small coastal submarine, the Project 877 EKM diesel-electric submarine," the USC said, responding to the corresponding question.
The Project 877 and Project 636 diesel-electric submarines, and also Amur-1650 underwater cruisers were developed by the Rubin Central Design Bureau
while small sabotage submarines (P-650 and Piranya-T) were created by the Malakhit Design Bureau..."
Also see a TASS 2016 article 'Black holes' of the Russian Navy focusing on the Kilo 636.6.