667822 has 4 divisors (see below), whose sum is σ = 1001736. Its totient is φ = 333910.

The previous prime is 667819. The next prime is 667829. The reversal of 667822 is 228766.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166954 + ... + 166957.

It is an arithmetic number, because the mean of its divisors is an integer number (250434).

2⁶⁶⁷⁸²² is an apocalyptic number.

667822 is a deficient number, since it is larger than the sum of its proper divisors (333914).

667822 is a wasteful number, since it uses less digits than its factorization.

667822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333913.

The product of its digits is 8064, while the sum is 31.

The square root of 667822 is about 817.2037689585. The cubic root of 667822 is about 87.4084811819.

The spelling of 667822 in words is "six hundred sixty-seven thousand, eight hundred twenty-two".