660306 has 8 divisors (see below), whose sum is σ = 1320624. Its totient is φ = 220100.

The previous prime is 660299. The next prime is 660329. The reversal of 660306 is 603066.

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

660306 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660306.

It is an unprimeable number.

660306 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, 55020 + ... + 55031.

It is an arithmetic number, because the mean of its divisors is an integer number (165078).

2⁶⁶⁰³⁰⁶ is an apocalyptic number.

660306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

660306 is a wasteful number, since it uses less digits than its factorization.

660306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110056.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 660306 is about 812.5921486207. The cubic root of 660306 is about 87.0793304683.

The spelling of 660306 in words is "six hundred sixty thousand, three hundred six".