660606 has 16 divisors (see below), whose sum is σ = 1378944. Its totient is φ = 210584.

The previous prime is 660601. The next prime is 660607. The reversal of 660606 is 606066.

660606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

660606 is a modest number, since divided by 606 gives 66 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2256 + ... + 2531.

It is an arithmetic number, because the mean of its divisors is an integer number (86184).

2⁶⁶⁰⁶⁰⁶ is an apocalyptic number.

660606 is an abundant number, since it is smaller than the sum of its proper divisors (718338).

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

660606 is a wasteful number, since it uses less digits than its factorization.

660606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 660606 is about 812.7767221076. The cubic root of 660606 is about 87.0925161952.

It can be divided in two parts, 66060 and 6, that added together give a palindrome (66066).

The spelling of 660606 in words is "six hundred sixty thousand, six hundred six".