666882 has 12 divisors (see below), whose sum is σ = 1444950. Its totient is φ = 222288.

The previous prime is 666871. The next prime is 666889. The reversal of 666882 is 288666.

It can be written as a sum of positive squares in only one way, i.e., 641601 + 25281 = 801^2 + 159^2 .

It is not an unprimeable number, because it can be changed into a prime (666889) by changing a digit.

666882 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18507 + ... + 18542.

2⁶⁶⁶⁸⁸² is an apocalyptic number.

666882 is an abundant number, since it is smaller than the sum of its proper divisors (778068).

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

666882 is a wasteful number, since it uses less digits than its factorization.

666882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37057 (or 37054 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 666882 is about 816.6284344792. The cubic root of 666882 is about 87.3674510108.

The spelling of 666882 in words is "six hundred sixty-six thousand, eight hundred eighty-two".