91166105 has 4 divisors (see below), whose sum is σ = 109399332. Its totient is φ = 72932880.

The previous prime is 91166093. The next prime is 91166197. The reversal of 91166105 is 50166119.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36228361 + 54937744 = 6019^2 + 7412^2 .

It is a de Polignac number, because none of the positive numbers 2^k-91166105 is a prime.

It is a super-2 number, since 2×91166105² = 16622517401742050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9116606 + ... + 9116615.

It is an arithmetic number, because the mean of its divisors is an integer number (27349833).

Almost surely, 2^91166105 is an apocalyptic number.

It is an amenable number.

91166105 is a deficient number, since it is larger than the sum of its proper divisors (18233227).

91166105 is a wasteful number, since it uses less digits than its factorization.

91166105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18233226.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 91166105 is about 9548.0943124793. The cubic root of 91166105 is about 450.0676523802.

The spelling of 91166105 in words is "ninety-one million, one hundred sixty-six thousand, one hundred five".