165617216207 has 2 divisors, whose sum is σ = 165617216208. Its totient is φ = 165617216206.

The previous prime is 165617216189. The next prime is 165617216251. The reversal of 165617216207 is 702612716561.

It is an a-pointer prime, because the next prime (165617216251) can be obtained adding 165617216207 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165617216207 - 2⁶ = 165617216143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165617212207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82808608103 + 82808608104.

It is an arithmetic number, because the mean of its divisors is an integer number (82808608104).

Almost surely, 2^165617216207 is an apocalyptic number.

165617216207 is a deficient number, since it is larger than the sum of its proper divisors (1).

165617216207 is an equidigital number, since it uses as much as digits as its factorization.

165617216207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 165617216207 in words is "one hundred sixty-five billion, six hundred seventeen million, two hundred sixteen thousand, two hundred seven".