165605411 has 2 divisors, whose sum is σ = 165605412. Its totient is φ = 165605410.

The previous prime is 165605351. The next prime is 165605413. The reversal of 165605411 is 114506561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165605411 is a prime.

Together with 165605413, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165605413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82802705 + 82802706.

It is an arithmetic number, because the mean of its divisors is an integer number (82802706).

Almost surely, 2^165605411 is an apocalyptic number.

165605411 is a deficient number, since it is larger than the sum of its proper divisors (1).

165605411 is an equidigital number, since it uses as much as digits as its factorization.

165605411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 165605411 is about 12868.7765929788. The cubic root of 165605411 is about 549.1506571132.

The spelling of 165605411 in words is "one hundred sixty-five million, six hundred five thousand, four hundred eleven".