165755506871 has 2 divisors, whose sum is σ = 165755506872. Its totient is φ = 165755506870.

The previous prime is 165755506853. The next prime is 165755506877. The reversal of 165755506871 is 178605557561.

It is a strong prime.

It is an emirp because it is prime and its reverse (178605557561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165755506871 - 2³⁰ = 164681765047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165755506877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82877753435 + 82877753436.

It is an arithmetic number, because the mean of its divisors is an integer number (82877753436).

Almost surely, 2^165755506871 is an apocalyptic number.

165755506871 is a deficient number, since it is larger than the sum of its proper divisors (1).

165755506871 is an equidigital number, since it uses as much as digits as its factorization.

165755506871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820000, while the sum is 56.

The spelling of 165755506871 in words is "one hundred sixty-five billion, seven hundred fifty-five million, five hundred six thousand, eight hundred seventy-one".