100663666 has 16 divisors (see below), whose sum is σ = 152296704. Its totient is φ = 49900464.

The previous prime is 100663657. The next prime is 100663679. The reversal of 100663666 is 666366001.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 165535 + ... + 166141.

It is an arithmetic number, because the mean of its divisors is an integer number (9518544).

Almost surely, 2^100663666 is an apocalyptic number.

100663666 is a deficient number, since it is larger than the sum of its proper divisors (51633038).

100663666 is a wasteful number, since it uses less digits than its factorization.

100663666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 100663666 is about 10033.1284253716. The cubic root of 100663666 is about 465.1834417094.

The spelling of 100663666 in words is "one hundred million, six hundred sixty-three thousand, six hundred sixty-six".