664122 has 24 divisors (see below), whose sum is σ = 1414656. Its totient is φ = 207808.

The previous prime is 664121. The next prime is 664123. The reversal of 664122 is 221466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (664121) and next prime (664123).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1543 + ... + 1925.

It is an arithmetic number, because the mean of its divisors is an integer number (58944).

2⁶⁶⁴¹²² is an apocalyptic number.

664122 is an abundant number, since it is smaller than the sum of its proper divisors (750534).

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

664122 is a wasteful number, since it uses less digits than its factorization.

664122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 405 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 664122 is about 814.9368073661. The cubic root of 664122 is about 87.2467562005.

Adding to 664122 its reverse (221466), we get a palindrome (885588).

The spelling of 664122 in words is "six hundred sixty-four thousand, one hundred twenty-two".