666066 has 16 divisors (see below), whose sum is σ = 1375488. Its totient is φ = 214800.

The previous prime is 666041. The next prime is 666067. The reversal of 666066 is 660666.

666066 is nontrivially palindromic in base 5.

It is not an unprimeable number, because it can be changed into a prime (666067) by changing a digit.

666066 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 7 ways as a sum of consecutive naturals, for example, 1605 + ... + 1976.

It is an arithmetic number, because the mean of its divisors is an integer number (85968).

2⁶⁶⁶⁰⁶⁶ is an apocalyptic number.

666066 is an abundant number, since it is smaller than the sum of its proper divisors (709422).

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

666066 is a wasteful number, since it uses less digits than its factorization.

666066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 666066 is about 816.1286663266. The cubic root of 666066 is about 87.3318020567.

The spelling of 666066 in words is "six hundred sixty-six thousand, sixty-six".