100999966 has 8 divisors (see below), whose sum is σ = 152134560. Its totient is φ = 50288448.

The previous prime is 100999949. The next prime is 100999979. The reversal of 100999966 is 669999001.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105171 + ... + 106126.

It is an arithmetic number, because the mean of its divisors is an integer number (19016820).

Almost surely, 2^100999966 is an apocalyptic number.

100999966 is a deficient number, since it is larger than the sum of its proper divisors (51134594).

100999966 is a wasteful number, since it uses less digits than its factorization.

100999966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211538.

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 100999966 is about 10049.8739295575. The cubic root of 100999966 is about 465.7008985235.

The spelling of 100999966 in words is "one hundred million, nine hundred ninety-nine thousand, nine hundred sixty-six".