165000703321 has 2 divisors, whose sum is σ = 165000703322. Its totient is φ = 165000703320.

The previous prime is 165000703319. The next prime is 165000703327. The reversal of 165000703321 is 123307000561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96060324096 + 68940379225 = 309936^2 + 262565^2 .

It is a cyclic number.

It is not a de Polignac number, because 165000703321 - 2¹ = 165000703319 is a prime.

Together with 165000703319, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 165000703321.

It is not a weakly prime, because it can be changed into another prime (165000703327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82500351660 + 82500351661.

It is an arithmetic number, because the mean of its divisors is an integer number (82500351661).

Almost surely, 2^165000703321 is an apocalyptic number.

It is an amenable number.

165000703321 is a deficient number, since it is larger than the sum of its proper divisors (1).

165000703321 is an equidigital number, since it uses as much as digits as its factorization.

165000703321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

Adding to 165000703321 its reverse (123307000561), we get a palindrome (288307703882).

The spelling of 165000703321 in words is "one hundred sixty-five billion, seven hundred three thousand, three hundred twenty-one".