100666880 has 40 divisors (see below), whose sum is σ = 241370712. Its totient is φ = 40265728.

The previous prime is 100666873. The next prime is 100666919. The reversal of 100666880 is 88666001.

It is a tau number, because it is divible by the number of its divisors (40).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 100666880.

It is a congruent 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, 17102 + ... + 22221.

Almost surely, 2^100666880 is an apocalyptic number.

100666880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100666880 is an abundant number, since it is smaller than the sum of its proper divisors (140703832).

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

100666880 is an frugal number, since it uses more digits than its factorization.

100666880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39346 (or 39330 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 100666880 is about 10033.2885934772. The cubic root of 100666880 is about 465.1883924652.

The spelling of 100666880 in words is "one hundred million, six hundred sixty-six thousand, eight hundred eighty".