91660986706 has 16 divisors (see below), whose sum is σ = 138133854144. Its totient is φ = 45616671184.

The previous prime is 91660986667. The next prime is 91660986707. The reversal of 91660986706 is 60768906619.

It is not an unprimeable number, because it can be changed into a prime (91660986707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536820 + ... + 686656.

It is an arithmetic number, because the mean of its divisors is an integer number (8633365884).

Almost surely, 2^91660986706 is an apocalyptic number.

91660986706 is a deficient number, since it is larger than the sum of its proper divisors (46472867438).

91660986706 is a wasteful number, since it uses less digits than its factorization.

91660986706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151265.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 91660986706 in words is "ninety-one billion, six hundred sixty million, nine hundred eighty-six thousand, seven hundred six".