665862 has 8 divisors (see below), whose sum is σ = 1331736. Its totient is φ = 221952.

The previous prime is 665857. The next prime is 665897. The reversal of 665862 is 268566.

It is a sphenic number, since it is the product of 3 distinct primes.

665862 is an admirable number.

It is a congruent number.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 55483 + ... + 55494.

It is an arithmetic number, because the mean of its divisors is an integer number (166467).

2⁶⁶⁵⁸⁶² is an apocalyptic number.

665862 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

665862 is a wasteful number, since it uses less digits than its factorization.

665862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110982.

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

The square root of 665862 is about 816.0036764623. The cubic root of 665862 is about 87.3228852693.

The spelling of 665862 in words is "six hundred sixty-five thousand, eight hundred sixty-two".