6516 is nontrivially palindromic in base 11.
It is a tau number, because it is divible by the number of its divisors (18).
It is a plaindrome in base 7.
It is a nialpdrome in base 3 and base 9.
It is a zygodrome in base 3.
It is a congruent number.
It is an unprimeable number.
6516 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
26516 is an apocalyptic number.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
6516 is a wasteful number, since it uses less digits than its factorization.
6516 is an odious number, because the sum of its binary digits is odd.
The square root of 6516 is about 80.7217442824. The cubic root of 6516 is about 18.6778561031.
Subtracting from 6516 its product of digits (180), we obtain a palindrome (6336).
The spelling of 6516 in words is "six thousand, five hundred sixteen".