665160 has 64 divisors (see below), whose sum is σ = 2090880. Its totient is φ = 168960.

The previous prime is 665153. The next prime is 665177. The reversal of 665160 is 61566.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 665160.

It is an unprimeable number.

665160 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 (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2640 + ... + 2880.

It is an arithmetic number, because the mean of its divisors is an integer number (32670).

2⁶⁶⁵¹⁶⁰ is an apocalyptic number.

665160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1045440).

665160 is an abundant number, since it is smaller than the sum of its proper divisors (1425720).

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

665160 is a wasteful number, since it uses less digits than its factorization.

665160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 665160 is about 815.5734179091. The cubic root of 665160 is about 87.2921871063.

The spelling of 665160 in words is "six hundred sixty-five thousand, one hundred sixty".