66928 is a Rhonda number in base 12.
It is a self number, because there is not a number n which added to its sum of digits gives 66928.
It is a congruent number.
266928 is an apocalyptic number.
It is an amenable number.
66928 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
66928 is a wasteful number, since it uses less digits than its factorization.
66928 is an evil number, because the sum of its binary digits is even.
The square root of 66928 is about 258.7044645923. The cubic root of 66928 is about 40.6009269608.
The spelling of 66928 in words is "sixty-six thousand, nine hundred twenty-eight".