91660743 has 6 divisors (see below), whose sum is σ = 132398864. Its totient is φ = 61107156.

The previous prime is 91660717. The next prime is 91660759. The reversal of 91660743 is 34706619.

91660743 is a `hidden beast` number, since 9 + 1 + 6 + 607 + 43 = 666.

It is not a de Polignac number, because 91660743 - 2⁵ = 91660711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91660698 and 91660707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91660343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5092255 + ... + 5092272.

Almost surely, 2^91660743 is an apocalyptic number.

91660743 is a deficient number, since it is larger than the sum of its proper divisors (40738121).

91660743 is a wasteful number, since it uses less digits than its factorization.

91660743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10184533 (or 10184530 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 91660743 is about 9573.9617191631. The cubic root of 91660743 is about 450.8801588489.

The spelling of 91660743 in words is "ninety-one million, six hundred sixty thousand, seven hundred forty-three".