100664220 has 48 divisors (see below), whose sum is σ = 291584160. Its totient is φ = 25917696.

The previous prime is 100664203. The next prime is 100664231. The reversal of 100664220 is 22466001.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27187 + ... + 30666.

It is an arithmetic number, because the mean of its divisors is an integer number (6074670).

Almost surely, 2^100664220 is an apocalyptic number.

100664220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100664220 is an abundant number, since it is smaller than the sum of its proper divisors (190919940).

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

100664220 is a wasteful number, since it uses less digits than its factorization.

100664220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57894 (or 57892 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 100664220 is about 10033.1560338709. The cubic root of 100664220 is about 465.1842950831.

The spelling of 100664220 in words is "one hundred million, six hundred sixty-four thousand, two hundred twenty".