660216 has 16 divisors (see below), whose sum is σ = 1650600. Its totient is φ = 220064.

The previous prime is 660199. The next prime is 660217. The reversal of 660216 is 612066.

It is a super-3 number, since 3×660216³ = 863335083566873088, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660192 and 660201.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660216.

It is not an unprimeable number, because it can be changed into a prime (660217) by changing a digit.

660216 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 3 ways as a sum of consecutive naturals, for example, 13731 + ... + 13778.

2⁶⁶⁰²¹⁶ is an apocalyptic number.

It is an amenable number.

660216 is an abundant number, since it is smaller than the sum of its proper divisors (990384).

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

660216 is a wasteful number, since it uses less digits than its factorization.

660216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27518 (or 27514 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 660216 is about 812.5367683988. The cubic root of 660216 is about 87.0753739714.

The spelling of 660216 in words is "six hundred sixty thousand, two hundred sixteen".