165680600191 has 12 divisors (see below), whose sum is σ = 178580015712. Its totient is φ = 153620966304.

The previous prime is 165680600177. The next prime is 165680600207. The reversal of 165680600191 is 191006086561.

It is a de Polignac number, because none of the positive numbers 2^k-165680600191 is a prime.

It is a super-3 number, since 3×165680600191³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165680600131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4865470 + ... + 4899403.

It is an arithmetic number, because the mean of its divisors is an integer number (14881667976).

Almost surely, 2^165680600191 is an apocalyptic number.

165680600191 is a deficient number, since it is larger than the sum of its proper divisors (12899415521).

165680600191 is an equidigital number, since it uses as much as digits as its factorization.

165680600191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9764958 (or 9764939 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 165680600191 in words is "one hundred sixty-five billion, six hundred eighty million, six hundred thousand, one hundred ninety-one".