668822 has 32 divisors (see below), whose sum is σ = 1292544. Its totient is φ = 252000.

The previous prime is 668821. The next prime is 668851. The reversal of 668822 is 228866.

It is a happy number.

668822 is nontrivially palindromic in base 6.

It is a zygodrome in base 6 and base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6572 + ... + 6672.

It is an arithmetic number, because the mean of its divisors is an integer number (40392).

2⁶⁶⁸⁸²² is an apocalyptic number.

668822 is a deficient number, since it is larger than the sum of its proper divisors (623722).

668822 is a wasteful number, since it uses less digits than its factorization.

668822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164.

The product of its digits is 9216, while the sum is 32.

The square root of 668822 is about 817.8153825895. The cubic root of 668822 is about 87.4520880556.

It can be divided in two parts, 66 and 8822, that added together give a palindrome (8888).

The spelling of 668822 in words is "six hundred sixty-eight thousand, eight hundred twenty-two".