665136 has 60 divisors (see below), whose sum is σ = 1934400. Its totient is φ = 213120.

The previous prime is 665131. The next prime is 665141. The reversal of 665136 is 631566.

665136 is a `hidden beast` number, since 6 + 651 + 3 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (665131) and next prime (665141).

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665136.

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

665136 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 11 ways as a sum of consecutive naturals, for example, 4390 + ... + 4538.

It is an arithmetic number, because the mean of its divisors is an integer number (32240).

2⁶⁶⁵¹³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967200).

665136 is an abundant number, since it is smaller than the sum of its proper divisors (1269264).

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

665136 is a wasteful number, since it uses less digits than its factorization.

665136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 185 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 665136 is about 815.5587042022. The cubic root of 665136 is about 87.2911372147.

The spelling of 665136 in words is "six hundred sixty-five thousand, one hundred thirty-six".