109901661 has 8 divisors (see below), whose sum is σ = 146627040. Its totient is φ = 73222032.

The previous prime is 109901657. The next prime is 109901699. The reversal of 109901661 is 166109901.

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

It is not a de Polignac number, because 109901661 - 2² = 109901657 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109901621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5371 + ... + 15768.

It is an arithmetic number, because the mean of its divisors is an integer number (18328380).

Almost surely, 2^109901661 is an apocalyptic number.

It is an amenable number.

109901661 is a deficient number, since it is larger than the sum of its proper divisors (36725379).

109901661 is a wasteful number, since it uses less digits than its factorization.

109901661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22875.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 109901661 is about 10483.3993055688. The cubic root of 109901661 is about 478.9991602765. Note that the first 3 decimals are identical.

The spelling of 109901661 in words is "one hundred nine million, nine hundred one thousand, six hundred sixty-one".