6645822 has 16 divisors (see below), whose sum is σ = 13601280. Its totient is φ = 2163672.

The previous prime is 6645817. The next prime is 6645823. The reversal of 6645822 is 2285466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12622 + ... + 13137.

It is an arithmetic number, because the mean of its divisors is an integer number (850080).

Almost surely, 2^6645822 is an apocalyptic number.

6645822 is an abundant number, since it is smaller than the sum of its proper divisors (6955458).

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

6645822 is a wasteful number, since it uses less digits than its factorization.

6645822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25807.

The product of its digits is 23040, while the sum is 33.

The square root of 6645822 is about 2577.9491849142. The cubic root of 6645822 is about 188.0108451568.

The spelling of 6645822 in words is "six million, six hundred forty-five thousand, eight hundred twenty-two".