6785 has 8 divisors (see below), whose sum is σ = 8640. Its totient is φ = 5104.

The previous prime is 6781. The next prime is 6791. The reversal of 6785 is 5876.

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

It is a cyclic number.

It is not a de Polignac number, because 6785 - 2² = 6781 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (6781) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 86 + ... + 144.

It is an arithmetic number, because the mean of its divisors is an integer number (1080).

It is a Proth number, since it is equal to 53 ⋅ 2⁷ + 1 and 53 < 2⁷.

2⁶⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

6785 is a deficient number, since it is larger than the sum of its proper divisors (1855).

6785 is a wasteful number, since it uses less digits than its factorization.

6785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87.

The product of its digits is 1680, while the sum is 26.

The square root of 6785 is about 82.3711114408. The cubic root of 6785 is about 18.9314240729.

Subtracting from 6785 its reverse (5876), we obtain a palindrome (909).

The spelling of 6785 in words is "six thousand, seven hundred eighty-five".