666532 has 12 divisors (see below), whose sum is σ = 1172556. Its totient is φ = 331520.

The previous prime is 666529. The next prime is 666541. The reversal of 666532 is 235666.

It can be written as a sum of positive squares in 2 ways, for example, as 430336 + 236196 = 656^2 + 486^2 .

It is a d-powerful number, because it can be written as 6² + 6³ + 5⁷ + 6⁷ + 3¹¹ + 2¹⁷ .

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 666532.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828 + ... + 1420.

It is an arithmetic number, because the mean of its divisors is an integer number (97713).

2⁶⁶⁶⁵³² is an apocalyptic number.

It is an amenable number.

666532 is a deficient number, since it is larger than the sum of its proper divisors (506024).

666532 is a wasteful number, since it uses less digits than its factorization.

666532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 876 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 666532 is about 816.4141106081. The cubic root of 666532 is about 87.3521639691.

The spelling of 666532 in words is "six hundred sixty-six thousand, five hundred thirty-two".