165326669 has 2 divisors, whose sum is σ = 165326670. Its totient is φ = 165326668.

The previous prime is 165326659. The next prime is 165326671. The reversal of 165326669 is 966623561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105062500 + 60264169 = 10250^2 + 7763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165326669 is a prime.

It is a super-2 number, since 2×165326669² = 54665814965271122, which contains 22 as substring.

Together with 165326671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165326659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82663334 + 82663335.

It is an arithmetic number, because the mean of its divisors is an integer number (82663335).

Almost surely, 2^165326669 is an apocalyptic number.

It is an amenable number.

165326669 is a deficient number, since it is larger than the sum of its proper divisors (1).

165326669 is an equidigital number, since it uses as much as digits as its factorization.

165326669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The square root of 165326669 is about 12857.9418648554. The cubic root of 165326669 is about 548.8423795160.

The spelling of 165326669 in words is "one hundred sixty-five million, three hundred twenty-six thousand, six hundred sixty-nine".