665135 has 8 divisors (see below), whose sum is σ = 804816. Its totient is φ = 527680.

The previous prime is 665131. The next prime is 665141. The reversal of 665135 is 531566.

665135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 665135 - 2² = 665131 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9 and base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200 + ... + 1170.

It is an arithmetic number, because the mean of its divisors is an integer number (100602).

2⁶⁶⁵¹³⁵ is an apocalyptic number.

665135 is a deficient number, since it is larger than the sum of its proper divisors (139681).

665135 is a wasteful number, since it uses less digits than its factorization.

665135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113.

The product of its digits is 2700, while the sum is 26.

The square root of 665135 is about 815.5580911253. The cubic root of 665135 is about 87.2910934687.

The spelling of 665135 in words is "six hundred sixty-five thousand, one hundred thirty-five".