265668 has 36 divisors (see below), whose sum is σ = 676368. Its totient is φ = 81120.

The previous prime is 265621. The next prime is 265703. The reversal of 265668 is 866562.

It is an unprimeable number.

265668 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 11 ways as a sum of consecutive naturals, for example, 1963 + ... + 2093.

It is an arithmetic number, because the mean of its divisors is an integer number (18788).

2²⁶⁵⁶⁶⁸ 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 265668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338184).

265668 is an abundant number, since it is smaller than the sum of its proper divisors (410700).

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

265668 is a wasteful number, since it uses less digits than its factorization.

265668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 149 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 265668 is about 515.4299176416. The cubic root of 265668 is about 64.2855082886.

The spelling of 265668 in words is "two hundred sixty-five thousand, six hundred sixty-eight".