100665100 has 18 divisors (see below), whose sum is σ = 218443484. Its totient is φ = 40266000.

The previous prime is 100665079. The next prime is 100665137. The reversal of 100665100 is 1566001.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 503226 + ... + 503425.

Almost surely, 2^100665100 is an apocalyptic number.

100665100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100665100 is an abundant number, since it is smaller than the sum of its proper divisors (117778384).

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

100665100 is a wasteful number, since it uses less digits than its factorization.

100665100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006665 (or 1006658 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 100665100 is about 10033.1998883706. The cubic root of 100665100 is about 465.1856506160.

Subtracting from 100665100 its reverse (1566001), we obtain a palindrome (99099099).

The spelling of 100665100 in words is "one hundred million, six hundred sixty-five thousand, one hundred".