665022 has 32 divisors (see below), whose sum is σ = 1428480. Its totient is φ = 205920.

The previous prime is 665017. The next prime is 665029. The reversal of 665022 is 220566.

It is a self number, because there is not a number n which added to its sum of digits gives 665022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665029) by changing a digit.

665022 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 in 15 ways as a sum of consecutive naturals, for example, 8379 + ... + 8457.

It is an arithmetic number, because the mean of its divisors is an integer number (44640).

2⁶⁶⁵⁰²² is an apocalyptic number.

665022 is an abundant number, since it is smaller than the sum of its proper divisors (763458).

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

665022 is a wasteful number, since it uses less digits than its factorization.

665022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 665022 is about 815.4888104689. The cubic root of 665022 is about 87.2861498847.

Adding to 665022 its reverse (220566), we get a palindrome (885588).

The spelling of 665022 in words is "six hundred sixty-five thousand, twenty-two".