91666666757 has 8 divisors (see below), whose sum is σ = 91767114432. Its totient is φ = 91566270400.

The previous prime is 91666666711. The next prime is 91666666787. The reversal of 91666666757 is 75766666619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91666666757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91666666693 and 91666666702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91666666787) 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 7 ways as a sum of consecutive naturals, for example, 4332398 + ... + 4353504.

It is an arithmetic number, because the mean of its divisors is an integer number (11470889304).

Almost surely, 2^91666666757 is an apocalyptic number.

It is an amenable number.

91666666757 is a deficient number, since it is larger than the sum of its proper divisors (100447675).

91666666757 is a wasteful number, since it uses less digits than its factorization.

91666666757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25659.

The product of its digits is 102876480, while the sum is 65.

The spelling of 91666666757 in words is "ninety-one billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred fifty-seven".