6650 has 24 divisors (see below), whose sum is σ = 14880. Its totient is φ = 2160.

The previous prime is 6637. The next prime is 6653. The reversal of 6650 is 566.

It is a happy number.

It is a nialpdrome in base 10.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341 + ... + 359.

It is an arithmetic number, because the mean of its divisors is an integer number (620).

2⁶⁶⁵⁰ is an apocalyptic number.

6650 is an abundant number, since it is smaller than the sum of its proper divisors (8230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7440).

6650 is a wasteful number, since it uses less digits than its factorization.

6650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 6650 is about 81.5475321515. The cubic root of 6650 is about 18.8050235557.

Multiplying 6650 by its sum of digits (17), we get a triangular number (113050 = T₄₇₅).

Subtracting from 6650 its reverse (566), we obtain a square (6084 = 78²).

It can be divided in two parts, 6 and 650, that added together give a palindrome (656).

The spelling of 6650 in words is "six thousand, six hundred fifty".