6655 has 8 divisors (see below), whose sum is σ = 8784. Its totient is φ = 4840.

The previous prime is 6653. The next prime is 6659. The reversal of 6655 is 5566.

It is not a de Polignac number, because 6655 - 2¹ = 6653 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8 and base 16.

It is a nialpdrome in base 10 and base 11.

It is a zygodrome in base 2 and base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600 + ... + 610.

It is an arithmetic number, because the mean of its divisors is an integer number (1098).

6655 is a deficient number, since it is larger than the sum of its proper divisors (2129).

6655 is an equidigital number, since it uses as much as digits as its factorization.

6655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38 (or 16 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The square root of 6655 is about 81.5781833581. The cubic root of 6655 is about 18.8097354134.

Adding to 6655 its reverse (5566), we get a palindrome (12221).

Subtracting from 6655 its reverse (5566), we obtain a square (1089 = 33²).

It can be divided in two parts, 66 and 55, that added together give a palindrome (121).

The spelling of 6655 in words is "six thousand, six hundred fifty-five".