91112661 has 8 divisors (see below), whose sum is σ = 134981760. Its totient is φ = 60741756.

The previous prime is 91112653. The next prime is 91112663. The reversal of 91112661 is 16621119.

It is not a de Polignac number, because 91112661 - 2³ = 91112653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3374543 = 91112661 / (9 + 1 + 1 + 1 + 2 + 6 + 6 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91112663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1687245 + ... + 1687298.

It is an arithmetic number, because the mean of its divisors is an integer number (16872720).

Almost surely, 2^91112661 is an apocalyptic number.

It is an amenable number.

91112661 is a deficient number, since it is larger than the sum of its proper divisors (43869099).

91112661 is a wasteful number, since it uses less digits than its factorization.

91112661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374552 (or 3374546 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 91112661 is about 9545.2952285406. The cubic root of 91112661 is about 449.9796879721.

The spelling of 91112661 in words is "ninety-one million, one hundred twelve thousand, six hundred sixty-one".