100661161 has 8 divisors (see below), whose sum is σ = 101645280. Its totient is φ = 99680928.

The previous prime is 100661153. The next prime is 100661167. The reversal of 100661161 is 161166001.

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

It is a cyclic number.

It is not a de Polignac number, because 100661161 - 2³ = 100661153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100661167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84210 + ... + 85396.

It is an arithmetic number, because the mean of its divisors is an integer number (12705660).

Almost surely, 2^100661161 is an apocalyptic number.

It is an amenable number.

100661161 is a deficient number, since it is larger than the sum of its proper divisors (984119).

100661161 is a wasteful number, since it uses less digits than its factorization.

100661161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 100661161 is about 10033.0035881584. The cubic root of 100661161 is about 465.1795830044.

The spelling of 100661161 in words is "one hundred million, six hundred sixty-one thousand, one hundred sixty-one".