6530 has 8 divisors (see below), whose sum is σ = 11772. Its totient is φ = 2608.

The previous prime is 6529. The next prime is 6547. The reversal of 6530 is 356.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6241 + 289 = 79^2 + 17^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 9 and base 10.

It is a zygodrome in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317 + ... + 336.

6530 is a deficient number, since it is larger than the sum of its proper divisors (5242).

6530 is a wasteful number, since it uses less digits than its factorization.

6530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 6530 is about 80.8084154033. The cubic root of 6530 is about 18.6912233496.

Adding to 6530 its reverse (356), we get a palindrome (6886).

The spelling of 6530 in words is "six thousand, five hundred thirty".