91116669 has 12 divisors (see below), whose sum is σ = 138911136. Its totient is φ = 52041672.

The previous prime is 91116631. The next prime is 91116673. The reversal of 91116669 is 96661119.

It is not a de Polignac number, because 91116669 - 2¹⁷ = 90985597 is a prime.

It is a super-2 number, since 2×91116669² = 16604494739311122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91116689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42702 + ... + 44784.

It is an arithmetic number, because the mean of its divisors is an integer number (11575928).

Almost surely, 2^91116669 is an apocalyptic number.

It is an amenable number.

91116669 is a deficient number, since it is larger than the sum of its proper divisors (47794467).

91116669 is an frugal number, since it uses more digits than its factorization.

91116669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176 (or 2093 counting only the distinct ones).

The product of its digits is 17496, while the sum is 39.

The square root of 91116669 is about 9545.5051725930. The cubic root of 91116669 is about 449.9862860018.

The spelling of 91116669 in words is "ninety-one million, one hundred sixteen thousand, six hundred sixty-nine".