666880532 has 12 divisors (see below), whose sum is σ = 1167269460. Its totient is φ = 333374976.

The previous prime is 666880531. The next prime is 666880537. The reversal of 666880532 is 235088666.

It can be written as a sum of positive squares in 2 ways, for example, as 131698576 + 535181956 = 11476^2 + 23134^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666880531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12194 + ... + 38502.

It is an arithmetic number, because the mean of its divisors is an integer number (97272455).

Almost surely, 2^666880532 is an apocalyptic number.

It is an amenable number.

666880532 is a deficient number, since it is larger than the sum of its proper divisors (500388928).

666880532 is a wasteful number, since it uses less digits than its factorization.

666880532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32650 (or 32648 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 666880532 is about 25824.0301269961. The cubic root of 666880532 is about 873.6738690377.

The spelling of 666880532 in words is "six hundred sixty-six million, eight hundred eighty thousand, five hundred thirty-two".