91666315 has 16 divisors (see below), whose sum is σ = 119091168. Its totient is φ = 67332096.

The previous prime is 91666301. The next prime is 91666327. The reversal of 91666315 is 51366619.

It is not a de Polignac number, because 91666315 - 2⁹ = 91665803 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, 8892 + ... + 16198.

It is an arithmetic number, because the mean of its divisors is an integer number (7443198).

Almost surely, 2^91666315 is an apocalyptic number.

91666315 is a deficient number, since it is larger than the sum of its proper divisors (27424853).

91666315 is a wasteful number, since it uses less digits than its factorization.

91666315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7518.

The product of its digits is 29160, while the sum is 37.

The square root of 91666315 is about 9574.2527123531. The cubic root of 91666315 is about 450.8892949060.

The spelling of 91666315 in words is "ninety-one million, six hundred sixty-six thousand, three hundred fifteen".