666552 has 16 divisors (see below), whose sum is σ = 1666440. Its totient is φ = 222176.

The previous prime is 666541. The next prime is 666557. The reversal of 666552 is 255666.

666552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666557) by changing a digit.

666552 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, 13863 + ... + 13910.

2⁶⁶⁶⁵⁵² is an apocalyptic number.

It is an amenable number.

666552 is an abundant number, since it is smaller than the sum of its proper divisors (999888).

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

666552 is a wasteful number, since it uses less digits than its factorization.

666552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27782 (or 27778 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 666552 is about 816.4263592021. The cubic root of 666552 is about 87.3530376584.

The spelling of 666552 in words is "six hundred sixty-six thousand, five hundred fifty-two".