91966671 has 20 divisors (see below), whose sum is σ = 138059064. Its totient is φ = 61009200.

The previous prime is 91966657. The next prime is 91966697. The reversal of 91966671 is 17666919.

It is not a de Polignac number, because 91966671 - 2¹⁸ = 91704527 is a prime.

It is a super-3 number, since 3×91966671³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91966601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14401 + ... + 19781.

Almost surely, 2^91966671 is an apocalyptic number.

91966671 is a deficient number, since it is larger than the sum of its proper divisors (46092393).

91966671 is a wasteful number, since it uses less digits than its factorization.

91966671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604 (or 5595 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 91966671 is about 9589.9254950182. The cubic root of 91966671 is about 451.3812228258.

The spelling of 91966671 in words is "ninety-one million, nine hundred sixty-six thousand, six hundred seventy-one".