665016 has 48 divisors (see below), whose sum is σ = 1835400. Its totient is φ = 200640.

The previous prime is 665011. The next prime is 665017. The reversal of 665016 is 610566.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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

665016 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2790 + ... + 3018.

2⁶⁶⁵⁰¹⁶ is an apocalyptic number.

665016 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917700).

665016 is an abundant number, since it is smaller than the sum of its proper divisors (1170384).

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

665016 is a wasteful number, since it uses less digits than its factorization.

665016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 245 counting only the distinct ones).

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

The square root of 665016 is about 815.4851316854. The cubic root of 665016 is about 87.2858873778.

It can be divided in two parts, 6650 and 16, that added together give a palindrome (6666).

The spelling of 665016 in words is "six hundred sixty-five thousand, sixteen".