91668417585 has 8 divisors (see below), whose sum is σ = 146669468160. Its totient is φ = 48889822704.

The previous prime is 91668417553. The next prime is 91668417683. The reversal of 91668417585 is 58571486619.

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

It is not a de Polignac number, because 91668417585 - 2⁵ = 91668417553 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3055613905 + ... + 3055613934.

It is an arithmetic number, because the mean of its divisors is an integer number (18333683520).

Almost surely, 2^91668417585 is an apocalyptic number.

It is an amenable number.

91668417585 is a deficient number, since it is larger than the sum of its proper divisors (55001050575).

91668417585 is a wasteful number, since it uses less digits than its factorization.

91668417585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6111227847.

The product of its digits is 14515200, while the sum is 60.

The spelling of 91668417585 in words is "ninety-one billion, six hundred sixty-eight million, four hundred seventeen thousand, five hundred eighty-five".