91666886142 has 16 divisors (see below), whose sum is σ = 197436370320. Its totient is φ = 28205195712.

The previous prime is 91666886089. The next prime is 91666886159. The reversal of 91666886142 is 24168866619.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587608167 + ... + 587608322.

It is an arithmetic number, because the mean of its divisors is an integer number (12339773145).

Almost surely, 2^91666886142 is an apocalyptic number.

91666886142 is an abundant number, since it is smaller than the sum of its proper divisors (105769484178).

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

91666886142 is a wasteful number, since it uses less digits than its factorization.

91666886142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175216507.

The product of its digits is 5971968, while the sum is 57.

The spelling of 91666886142 in words is "ninety-one billion, six hundred sixty-six million, eight hundred eighty-six thousand, one hundred forty-two".