91066105 has 8 divisors (see below), whose sum is σ = 117685512. Its totient is φ = 67248768.

The previous prime is 91066099. The next prime is 91066109. The reversal of 91066105 is 50166019.

It can be written as a sum of positive squares in 4 ways, for example, as 3606201 + 87459904 = 1899^2 + 9352^2 .

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 91066105 - 2⁷ = 91065977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91066109) 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, 700444 + ... + 700573.

It is an arithmetic number, because the mean of its divisors is an integer number (14710689).

Almost surely, 2^91066105 is an apocalyptic number.

It is an amenable number.

91066105 is a deficient number, since it is larger than the sum of its proper divisors (26619407).

91066105 is a wasteful number, since it uses less digits than its factorization.

91066105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401035.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 91066105 is about 9542.8562286142. The cubic root of 91066105 is about 449.9030326046.

The spelling of 91066105 in words is "ninety-one million, sixty-six thousand, one hundred five".