660206 has 4 divisors (see below), whose sum is σ = 990312. Its totient is φ = 330102.

The previous prime is 660199. The next prime is 660217. The reversal of 660206 is 602066.

660206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165050 + ... + 165053.

It is an arithmetic number, because the mean of its divisors is an integer number (247578).

2⁶⁶⁰²⁰⁶ is an apocalyptic number.

660206 is a deficient number, since it is larger than the sum of its proper divisors (330106).

660206 is a wasteful number, since it uses less digits than its factorization.

660206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330105.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 660206 is about 812.5306148078. The cubic root of 660206 is about 87.0749343385.

The spelling of 660206 in words is "six hundred sixty thousand, two hundred six".