Successfully passed entrance exams to the Kyiv-Mohyla Collegium, which at that time was one of the most reputable educational institutions in Europe.

Velichko also fulfilled the special orders of Vasyl Kochubey, "the most necessary and secret at that time military affairs," even those who went to the Russian tsar, and the cipher (encrypted) letters to the owners of Volosky and Muntyansky.

And in the center of the village Zhuky, on the top, near the chapel of the Protection of the Most Holy Theotokos and the mound of memory, a granite boulder was set up, which symbolizes the last shelter of the famous historian of the Cossack.

Today, in the village where Samiilo Velychko was born, lived and worked, the memorial complex of the glory of the Ukrainian Cossacks was erected.

In 2020, the National Bank of Ukraine issued a commemorative silver coin with a face value of ₴10, dedicated to Samiilo Velychko.