91686669005 has 16 divisors (see below), whose sum is σ = 111471534720. Its totient is φ = 72389178048.

The previous prime is 91686668993. The next prime is 91686669043. The reversal of 91686669005 is 50096668619.

It is a cyclic number.

It is not a de Polignac number, because 91686669005 - 2⁴ = 91686668989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152915 + ... + 454704.

It is an arithmetic number, because the mean of its divisors is an integer number (6966970920).

Almost surely, 2^91686669005 is an apocalyptic number.

It is an amenable number.

91686669005 is a deficient number, since it is larger than the sum of its proper divisors (19784865715).

91686669005 is a wasteful number, since it uses less digits than its factorization.

91686669005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608020.

The product of its (nonzero) digits is 4199040, while the sum is 56.

The spelling of 91686669005 in words is "ninety-one billion, six hundred eighty-six million, six hundred sixty-nine thousand, five".