665098 has 8 divisors (see below), whose sum is σ = 1140192. Its totient is φ = 285036.

The previous prime is 665089. The next prime is 665111. The reversal of 665098 is 890566.

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

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, 23740 + ... + 23767.

It is an arithmetic number, because the mean of its divisors is an integer number (142524).

2⁶⁶⁵⁰⁹⁸ is an apocalyptic number.

665098 is a deficient number, since it is larger than the sum of its proper divisors (475094).

665098 is a wasteful number, since it uses less digits than its factorization.

665098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47516.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 665098 is about 815.5354069567. The cubic root of 665098 is about 87.2894748347.

The spelling of 665098 in words is "six hundred sixty-five thousand, ninety-eight".