109118661 has 16 divisors (see below), whose sum is σ = 149907264. Its totient is φ = 70550784.

The previous prime is 109118657. The next prime is 109118731. The reversal of 109118661 is 166811901.

It is not a de Polignac number, because 109118661 - 2² = 109118657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109118621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37101 + ... + 39933.

It is an arithmetic number, because the mean of its divisors is an integer number (9369204).

Almost surely, 2^109118661 is an apocalyptic number.

It is an amenable number.

109118661 is a deficient number, since it is larger than the sum of its proper divisors (40788603).

109118661 is a wasteful number, since it uses less digits than its factorization.

109118661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 109118661 is about 10445.9877943639. The cubic root of 109118661 is about 477.8588966867.

The spelling of 109118661 in words is "one hundred nine million, one hundred eighteen thousand, six hundred sixty-one".