109665866 has 8 divisors (see below), whose sum is σ = 164987940. Its totient is φ = 54669888.

The previous prime is 109665859. The next prime is 109665883. The reversal of 109665866 is 668566901.

It can be written as a sum of positive squares in 2 ways, for example, as 109641841 + 24025 = 10471^2 + 155^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 109665866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80681 + ... + 82028.

Almost surely, 2^109665866 is an apocalyptic number.

109665866 is a deficient number, since it is larger than the sum of its proper divisors (55322074).

109665866 is a wasteful number, since it uses less digits than its factorization.

109665866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163048.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 109665866 is about 10472.1471532824. The cubic root of 109665866 is about 478.6563493257.

The spelling of 109665866 in words is "one hundred nine million, six hundred sixty-five thousand, eight hundred sixty-six".