6537 has 4 divisors (see below), whose sum is σ = 8720. Its totient is φ = 4356.

The previous prime is 6529. The next prime is 6547. The reversal of 6537 is 7356.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6537 - 2³ = 6529 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 6537.

It is not an unprimeable number, because it can be changed into a prime (6547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087 + ... + 1092.

It is an arithmetic number, because the mean of its divisors is an integer number (2180).

2⁶⁵³⁷ is an apocalyptic number.

It is an amenable number.

6537 is a deficient number, since it is larger than the sum of its proper divisors (2183).

6537 is a wasteful number, since it uses less digits than its factorization.

6537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182.

The product of its digits is 630, while the sum is 21.

The square root of 6537 is about 80.8517161228. The cubic root of 6537 is about 18.6978998089.

The spelling of 6537 in words is "six thousand, five hundred thirty-seven".