665792 has 28 divisors (see below), whose sum is σ = 1347216. Its totient is φ = 326400.

The previous prime is 665789. The next prime is 665801. The reversal of 665792 is 297566.

Its product of digits (22680) is a multiple of the sum of its prime factors (216).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6413 + ... + 6515.

2⁶⁶⁵⁷⁹² 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 665792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673608).

665792 is an abundant number, since it is smaller than the sum of its proper divisors (681424).

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

665792 is a wasteful number, since it uses less digits than its factorization.

665792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 206 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 665792 is about 815.9607833714. The cubic root of 665792 is about 87.3198251676.

The spelling of 665792 in words is "six hundred sixty-five thousand, seven hundred ninety-two".