91666666758 has 8 divisors (see below), whose sum is σ = 183333333528. Its totient is φ = 30555555584.

The previous prime is 91666666711. The next prime is 91666666787. The reversal of 91666666758 is 85766666619.

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

91666666758 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7638888891 + ... + 7638888902.

It is an arithmetic number, because the mean of its divisors is an integer number (22916666691).

Almost surely, 2^91666666758 is an apocalyptic number.

91666666758 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91666666758 is a wasteful number, since it uses less digits than its factorization.

91666666758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15277777798.

The product of its digits is 117573120, while the sum is 66.

The spelling of 91666666758 in words is "ninety-one billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred fifty-eight".