668180 has 12 divisors (see below), whose sum is σ = 1403220. Its totient is φ = 267264.

The previous prime is 668179. The next prime is 668201. The reversal of 668180 is 81866.

It can be written as a sum of positive squares in 2 ways, for example, as 169744 + 498436 = 412^2 + 706^2 .

It is a congruent number.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 16685 + ... + 16724.

It is an arithmetic number, because the mean of its divisors is an integer number (116935).

2⁶⁶⁸¹⁸⁰ is an apocalyptic number.

It is an amenable number.

668180 is an abundant number, since it is smaller than the sum of its proper divisors (735040).

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

668180 is a wasteful number, since it uses less digits than its factorization.

668180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33418 (or 33416 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 668180 is about 817.4227792275. The cubic root of 668180 is about 87.4240974421.

It can be divided in two parts, 668 and 180, that added together give a palindrome (848).

The spelling of 668180 in words is "six hundred sixty-eight thousand, one hundred eighty".