665922 has 16 divisors (see below), whose sum is σ = 1364832. Its totient is φ = 216480.

The previous prime is 665921. The next prime is 665923. The reversal of 665922 is 229566.

It is an interprime number because it is at equal distance from previous prime (665921) and next prime (665923).

It is a super-2 number, since 2×665922² = 886904220168, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6² + 6⁶ + 9⁵ + 5⁵ + 2¹⁵ + 2¹⁹ .

It is a self number, because there is not a number n which added to its sum of digits gives 665922.

It is not an unprimeable number, because it can be changed into a prime (665921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1108 + ... + 1599.

It is an arithmetic number, because the mean of its divisors is an integer number (85302).

2⁶⁶⁵⁹²² is an apocalyptic number.

665922 is an abundant number, since it is smaller than the sum of its proper divisors (698910).

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

665922 is a wasteful number, since it uses less digits than its factorization.

665922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753.

The product of its digits is 6480, while the sum is 30.

The square root of 665922 is about 816.0404401744. The cubic root of 665922 is about 87.3255080428.

The spelling of 665922 in words is "six hundred sixty-five thousand, nine hundred twenty-two".