6765 has 16 divisors (see below), whose sum is σ = 12096.
Its totient is φ = 3200.
The previous prime is 6763. The next prime is 6779. The reversal of 6765 is 5676.
It is the 19-th Fibonacci number F19.
6765 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is not a de Polignac number, because 6765 - 21 = 6763 is a prime.
It is an alternating number because its digits alternate between even and odd.
Its product of digits (1260) is a multiple of the sum of its prime divisors (60).
6765 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (6761) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145 + ... + 185.
It is an arithmetic number, because the mean of its divisors is an integer number (756).
26765 is an apocalyptic number.
It is an amenable number.
6765 is a deficient number, since it is larger than the sum of its proper divisors (5331).
6765 is a wasteful number, since it uses less digits than its factorization.
6765 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 60.
The product of its digits is 1260, while the sum is 24.
The square root of 6765 is about 82.2496200599.
The cubic root of 6765 is about 18.9128045143.
Subtracting from 6765 its reverse (5676), we obtain a square (1089 = 332).
The spelling of 6765 in words is "six thousand, seven hundred sixty-five".