665010 has 40 divisors (see below), whose sum is σ = 1790316. Its totient is φ = 177120.

The previous prime is 664997. The next prime is 665011. The reversal of 665010 is 10566.

665010 is a `hidden beast` number, since 6 + 650 + 10 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 641601 + 23409 = 801^2 + 153^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665010.

It is not an unprimeable number, because it can be changed into a prime (665011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 400 + ... + 1220.

2⁶⁶⁵⁰¹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895158).

665010 is an abundant number, since it is smaller than the sum of its proper divisors (1125306).

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

665010 is a wasteful number, since it uses less digits than its factorization.

665010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 665010 is about 815.4814528853. The cubic root of 665010 is about 87.2856248694.

Adding to 665010 its reverse (10566), we get a palindrome (675576).

The spelling of 665010 in words is "six hundred sixty-five thousand, ten".