668118 has 32 divisors (see below), whose sum is σ = 1492992. Its totient is φ = 197600.

The previous prime is 668111. The next prime is 668141. The reversal of 668118 is 811866.

668118 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668111) by changing a digit.

668118 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 15 ways as a sum of consecutive naturals, for example, 3403 + ... + 3593.

It is an arithmetic number, because the mean of its divisors is an integer number (46656).

2⁶⁶⁸¹¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746496).

668118 is an abundant number, since it is smaller than the sum of its proper divisors (824874).

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

668118 is a wasteful number, since it uses less digits than its factorization.

668118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its digits is 2304, while the sum is 30.

The square root of 668118 is about 817.3848542761. The cubic root of 668118 is about 87.4213933495.

The spelling of 668118 in words is "six hundred sixty-eight thousand, one hundred eighteen".