91660095760 has 40 divisors (see below), whose sum is σ = 213125031000. Its totient is φ = 36661404672.

The previous prime is 91660095743. The next prime is 91660095809. The reversal of 91660095760 is 6759006619.

It can be written as a sum of positive squares in 4 ways, for example, as 7979491584 + 83680604176 = 89328^2 + 289276^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 1387644 + ... + 1452196.

It is an arithmetic number, because the mean of its divisors is an integer number (5328125775).

Almost surely, 2^91660095760 is an apocalyptic number.

It is an amenable number.

91660095760 is an abundant number, since it is smaller than the sum of its proper divisors (121464935240).

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

91660095760 is a wasteful number, since it uses less digits than its factorization.

91660095760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82315 (or 82309 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 91660095760 in words is "ninety-one billion, six hundred sixty million, ninety-five thousand, seven hundred sixty".