669022 has 4 divisors (see below), whose sum is σ = 1003536. Its totient is φ = 334510.

The previous prime is 668999. The next prime is 669023. The reversal of 669022 is 220966.

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 (669023) by changing a digit.

669022 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 167254 + ... + 167257.

It is an arithmetic number, because the mean of its divisors is an integer number (250884).

2⁶⁶⁹⁰²² is an apocalyptic number.

669022 is a deficient number, since it is larger than the sum of its proper divisors (334514).

669022 is a wasteful number, since it uses less digits than its factorization.

669022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334513.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 669022 is about 817.9376504355. The cubic root of 669022 is about 87.4608042135.

Adding to 669022 its reverse (220966), we get a palindrome (889988).

The spelling of 669022 in words is "six hundred sixty-nine thousand, twenty-two".