165656159 has 2 divisors, whose sum is σ = 165656160. Its totient is φ = 165656158.

The previous prime is 165656147. The next prime is 165656191. The reversal of 165656159 is 951656561.

It is a weak prime.

It is an emirp because it is prime and its reverse (951656561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165656159 is a prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82828079 + 82828080.

It is an arithmetic number, because the mean of its divisors is an integer number (82828080).

Almost surely, 2^165656159 is an apocalyptic number.

165656159 is a deficient number, since it is larger than the sum of its proper divisors (1).

165656159 is an equidigital number, since it uses as much as digits as its factorization.

165656159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243000, while the sum is 44.

The square root of 165656159 is about 12870.7481911503. The cubic root of 165656159 is about 549.2067451585.

The spelling of 165656159 in words is "one hundred sixty-five million, six hundred fifty-six thousand, one hundred fifty-nine".