100668 has 12 divisors (see below), whose sum is σ = 234920. Its totient is φ = 33552.

The previous prime is 100649. The next prime is 100669. The reversal of 100668 is 866001.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100669) by changing a digit.

100668 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 3 ways as a sum of consecutive naturals, for example, 4183 + ... + 4206.

2¹⁰⁰⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

100668 is an abundant number, since it is smaller than the sum of its proper divisors (134252).

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

100668 is a wasteful number, since it uses less digits than its factorization.

100668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8396 (or 8394 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 100668 is about 317.2822087669. The cubic root of 100668 is about 46.5190117657.

Adding to 100668 its reverse (866001), we get a palindrome (966669).

The spelling of 100668 in words is "one hundred thousand, six hundred sixty-eight".