65::bit(8)::"char"

65::bit(8)::int::"char"

SELECT
  v,
  v::bit(8)::"char" AS "noint",
  v::bit(8)::int::"char" AS "viaint"
FROM (VALUES (65)) AS t(v);
 v  | noint | viaint
----+-------+--------
 65 | 0     | A
(1 row)

SELECT 65::bit(8);
   bit
----------
 01000001
(1 row)

SELECT '01000001'::"char";
 char
------
 0
(1 row)

SELECT 128::bit(8);
   bit
----------
 10000000
(1 row)

SELECT 128::bit(8)::"char";
 char
------
 1
(1 row)