165711061 has 2 divisors, whose sum is σ = 165711062. Its totient is φ = 165711060.

The previous prime is 165711059. The next prime is 165711071. The reversal of 165711061 is 160117561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158608836 + 7102225 = 12594^2 + 2665^2 .

It is a cyclic number.

It is not a de Polignac number, because 165711061 - 2¹ = 165711059 is a prime.

Together with 165711059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165711001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82855530 + 82855531.

It is an arithmetic number, because the mean of its divisors is an integer number (82855531).

Almost surely, 2^165711061 is an apocalyptic number.

It is an amenable number.

165711061 is a deficient number, since it is larger than the sum of its proper divisors (1).

165711061 is an equidigital number, since it uses as much as digits as its factorization.

165711061 is an odious number, because the sum of its binary digits is odd.

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

The square root of 165711061 is about 12872.8808353064. The cubic root of 165711061 is about 549.2674114173.

The spelling of 165711061 in words is "one hundred sixty-five million, seven hundred eleven thousand, sixty-one".