1665168 has 40 divisors (see below), whose sum is σ = 4353888. Its totient is φ = 548352.

The previous prime is 1665161. The next prime is 1665173. The reversal of 1665168 is 8615661.

It is not an unprimeable number, because it can be changed into a prime (1665161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5271 + ... + 5577.

2^1665168 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 1665168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2176944).

1665168 is an abundant number, since it is smaller than the sum of its proper divisors (2688720).

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

1665168 is a wasteful number, since it uses less digits than its factorization.

1665168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 425 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 1665168 is about 1290.4138870920. The cubic root of 1665168 is about 118.5275621764.

The spelling of 1665168 in words is "one million, six hundred sixty-five thousand, one hundred sixty-eight".