6506 has 4 divisors (see below), whose sum is σ = 9762.
Its totient is φ = 3252.
The previous prime is 6491. The next prime is 6521. The reversal of 6506 is 6056.
It is a happy number.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (6491) and next prime (6521).
It can be written as a sum of positive squares in only one way, i.e., 3481 + 3025 = 59^2 + 55^2
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1625 + ... + 1628.
26506 is an apocalyptic number.
6506 is a deficient number, since it is larger than the sum of its proper divisors (3256).
6506 is a wasteful number, since it uses less digits than its factorization.
6506 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3255.
The product of its (nonzero) digits is 180, while the sum is 17.
The square root of 6506 is about 80.6597793203.
The cubic root of 6506 is about 18.6682963430.
It can be divided in two parts, 650 and 6, that added together give a palindrome (656).
The spelling of 6506 in words is "six thousand, five hundred six".