665298 has 24 divisors (see below), whose sum is σ = 1505088. Its totient is φ = 211992.

The previous prime is 665293. The next prime is 665299. The reversal of 665298 is 892566.

It is not an unprimeable number, because it can be changed into a prime (665293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 390 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (62712).

2⁶⁶⁵²⁹⁸ is an apocalyptic number.

665298 is an abundant number, since it is smaller than the sum of its proper divisors (839790).

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

665298 is a wasteful number, since it uses less digits than its factorization.

665298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638 (or 1635 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 665298 is about 815.6580165731. The cubic root of 665298 is about 87.2982234929.

The spelling of 665298 in words is "six hundred sixty-five thousand, two hundred ninety-eight".