165161071 has 2 divisors, whose sum is σ = 165161072. Its totient is φ = 165161070.

The previous prime is 165161063. The next prime is 165161077. The reversal of 165161071 is 170161561.

165161071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (170161561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165161071 - 2³ = 165161063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165161077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82580535 + 82580536.

It is an arithmetic number, because the mean of its divisors is an integer number (82580536).

Almost surely, 2^165161071 is an apocalyptic number.

165161071 is a deficient number, since it is larger than the sum of its proper divisors (1).

165161071 is an equidigital number, since it uses as much as digits as its factorization.

165161071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 165161071 is about 12851.5007294868. The cubic root of 165161071 is about 548.6590705893.

The spelling of 165161071 in words is "one hundred sixty-five million, one hundred sixty-one thousand, seventy-one".