665108 has 12 divisors (see below), whose sum is σ = 1232532. Its totient is φ = 312960.

The previous prime is 665089. The next prime is 665111. The reversal of 665108 is 801566.

It can be written as a sum of positive squares in 2 ways, for example, as 407044 + 258064 = 638^2 + 508^2 .

It is a plaindrome in base 14.

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, 4823 + ... + 4958.

It is an arithmetic number, because the mean of its divisors is an integer number (102711).

2⁶⁶⁵¹⁰⁸ is an apocalyptic number.

665108 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

665108 is a deficient number, since it is larger than the sum of its proper divisors (567424).

665108 is a wasteful number, since it uses less digits than its factorization.

665108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9802 (or 9800 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 665108 is about 815.5415378753. The cubic root of 665108 is about 87.2899123092.

The spelling of 665108 in words is "six hundred sixty-five thousand, one hundred eight".