91516566 has 8 divisors (see below), whose sum is σ = 183033144. Its totient is φ = 30505520.

The previous prime is 91516543. The next prime is 91516583. The reversal of 91516566 is 66561519.

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

91516566 is an admirable number.

It is a congruent 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, 7626375 + ... + 7626386.

It is an arithmetic number, because the mean of its divisors is an integer number (22879143).

Almost surely, 2^91516566 is an apocalyptic number.

91516566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91516566 is a wasteful number, since it uses less digits than its factorization.

91516566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15252766.

The product of its digits is 48600, while the sum is 39.

The square root of 91516566 is about 9566.4291143561. The cubic root of 91516566 is about 450.6436320648.

The spelling of 91516566 in words is "ninety-one million, five hundred sixteen thousand, five hundred sixty-six".