165222767009 has 4 divisors (see below), whose sum is σ = 166078843716. Its totient is φ = 164366690304.

The previous prime is 165222766999. The next prime is 165222767023. The reversal of 165222767009 is 900767222561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19415635600 + 145807131409 = 139340^2 + 381847^2 .

It is a cyclic number.

It is not a de Polignac number, because 165222767009 - 2²⁰ = 165221718433 is a prime.

It is a super-2 number, since 2×165222767009² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165222767089) 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 in 3 ways as a sum of consecutive naturals, for example, 428038064 + ... + 428038449.

It is an arithmetic number, because the mean of its divisors is an integer number (41519710929).

Almost surely, 2^165222767009 is an apocalyptic number.

It is an amenable number.

165222767009 is a deficient number, since it is larger than the sum of its proper divisors (856076707).

165222767009 is an equidigital number, since it uses as much as digits as its factorization.

165222767009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856076706.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 165222767009 in words is "one hundred sixty-five billion, two hundred twenty-two million, seven hundred sixty-seven thousand, nine".