6688422 has 48 divisors (see below), whose sum is σ = 15816528. Its totient is φ = 2030400.

The previous prime is 6688421. The next prime is 6688433. The reversal of 6688422 is 2248866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688421) 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 23 ways as a sum of consecutive naturals, for example, 23493 + ... + 23775.

It is an arithmetic number, because the mean of its divisors is an integer number (329511).

Almost surely, 2^6688422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6688422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7908264).

6688422 is an abundant number, since it is smaller than the sum of its proper divisors (9128106).

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

6688422 is a wasteful number, since it uses less digits than its factorization.

6688422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 402 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 6688422 is about 2586.1983682618. The cubic root of 6688422 is about 188.4117090103.

It can be divided in two parts, 66 and 88422, that added together give a palindrome (88488).

The spelling of 6688422 in words is "six million, six hundred eighty-eight thousand, four hundred twenty-two".