100866 has 8 divisors (see below), whose sum is σ = 201744. Its totient is φ = 33620.

The previous prime is 100853. The next prime is 100907. The reversal of 100866 is 668001.

It is a sphenic number, since it is the product of 3 distinct primes.

100866 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8400 + ... + 8411.

It is an arithmetic number, because the mean of its divisors is an integer number (25218).

2¹⁰⁰⁸⁶⁶ is an apocalyptic number.

100866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

100866 is a wasteful number, since it uses less digits than its factorization.

100866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16816.

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

The square root of 100866 is about 317.5940805494. The cubic root of 100866 is about 46.5494906076.

Adding to 100866 its reverse (668001), we get a palindrome (768867).

It can be divided in two parts, 10086 and 6, that multiplied together give a square (60516 = 246²).

The spelling of 100866 in words is "one hundred thousand, eight hundred sixty-six".