664092 has 96 divisors (see below), whose sum is σ = 2069760. Its totient is φ = 181440.

The previous prime is 664091. The next prime is 664099. The reversal of 664092 is 290466.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664092.

It is not an unprimeable number, because it can be changed into a prime (664091) 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 31 ways as a sum of consecutive naturals, for example, 15423 + ... + 15465.

It is an arithmetic number, because the mean of its divisors is an integer number (21560).

2⁶⁶⁴⁰⁹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034880).

664092 is an abundant number, since it is smaller than the sum of its proper divisors (1405668).

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

664092 is a wasteful number, since it uses less digits than its factorization.

664092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 664092 is about 814.9184008231. The cubic root of 664092 is about 87.2454424649.

It can be divided in two parts, 66 and 4092, that multiplied together give a palindrome (270072).

The spelling of 664092 in words is "six hundred sixty-four thousand, ninety-two".