What is "bychchagdan"

Bychchagdan is a rural locality (a selo) in Dalyrsky Rural Okrug of Verkhnevilyuysky District in the Sakha Republic, Russia, located from Verkhnevilyuysk, the administrative center of the district and from Dalyr, the administrative center of the rural okrug. Its population as of the 2010 Census was 95, of whom 54 were male and 41 female, down from 101 as recorded during the 2002 Census.