665106 has 16 divisors (see below), whose sum is σ = 1432704. Its totient is φ = 204624.

The previous prime is 665089. The next prime is 665111. The reversal of 665106 is 601566.

It is a Curzon number.

It is a plaindrome in base 14.

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 7 ways as a sum of consecutive naturals, for example, 4186 + ... + 4341.

It is an arithmetic number, because the mean of its divisors is an integer number (89544).

2⁶⁶⁵¹⁰⁶ is an apocalyptic number.

665106 is an abundant number, since it is smaller than the sum of its proper divisors (767598).

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

665106 is a wasteful number, since it uses less digits than its factorization.

665106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8545.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 665106 is about 815.5403116953. The cubic root of 665106 is about 87.2898248147.

The spelling of 665106 in words is "six hundred sixty-five thousand, one hundred six".