168224168669 has 4 divisors (see below), whose sum is σ = 168225110844. Its totient is φ = 168223226496.

The previous prime is 168224168663. The next prime is 168224168737. The reversal of 168224168669 is 966861422861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 966861422861 = 434927 ⋅2223043.

It can be written as a sum of positive squares in 2 ways, for example, as 90390422500 + 77833746169 = 300650^2 + 278987^2 .

It is a cyclic number.

It is not a de Polignac number, because 168224168669 - 2⁴ = 168224168653 is a prime.

It is a super-2 number, since 2×168224168669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168224168663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112052 + ... + 590765.

It is an arithmetic number, because the mean of its divisors is an integer number (42056277711).

Almost surely, 2^168224168669 is an apocalyptic number.

It is an amenable number.

168224168669 is a deficient number, since it is larger than the sum of its proper divisors (942175).

168224168669 is an equidigital number, since it uses as much as digits as its factorization.

168224168669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942174.

The product of its digits is 11943936, while the sum is 59.

The spelling of 168224168669 in words is "one hundred sixty-eight billion, two hundred twenty-four million, one hundred sixty-eight thousand, six hundred sixty-nine".