91080665 has 16 divisors (see below), whose sum is σ = 120445248. Its totient is φ = 65693376.

The previous prime is 91080637. The next prime is 91080673. The reversal of 91080665 is 56608019.

It is a cyclic number.

It is not a de Polignac number, because 91080665 - 2¹⁰ = 91079641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13499 + ... + 19088.

It is an arithmetic number, because the mean of its divisors is an integer number (7527828).

Almost surely, 2^91080665 is an apocalyptic number.

It is an amenable number.

91080665 is a deficient number, since it is larger than the sum of its proper divisors (29364583).

91080665 is a wasteful number, since it uses less digits than its factorization.

91080665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32648.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 91080665 is about 9543.6190724484. The cubic root of 91080665 is about 449.9270087374.

The spelling of 91080665 in words is "ninety-one million, eighty thousand, six hundred sixty-five".