91670616 has 80 divisors (see below), whose sum is σ = 258267240. Its totient is φ = 30378240.

The previous prime is 91670609. The next prime is 91670651. The reversal of 91670616 is 61607619.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 155875 + ... + 156461.

Almost surely, 2^91670616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91670616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129133620).

91670616 is an abundant number, since it is smaller than the sum of its proper divisors (166596624).

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

91670616 is a wasteful number, since it uses less digits than its factorization.

91670616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 91670616 is about 9574.4773225487. The cubic root of 91670616 is about 450.8963467313.

The spelling of 91670616 in words is "ninety-one million, six hundred seventy thousand, six hundred sixteen".