2223165661 has 8 divisors (see below), whose sum is σ = 2394597920. Its totient is φ = 2057175792.

The previous prime is 2223165653. The next prime is 2223165677. The reversal of 2223165661 is 1665613222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2223165661 - 2³ = 2223165653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223165691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359750 + ... + 1361383.

It is an arithmetic number, because the mean of its divisors is an integer number (299324740).

Almost surely, 2^2223165661 is an apocalyptic number.

It is an amenable number.

2223165661 is a deficient number, since it is larger than the sum of its proper divisors (171432259).

2223165661 is a wasteful number, since it uses less digits than its factorization.

2223165661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721195.

The product of its digits is 25920, while the sum is 34.

The square root of 2223165661 is about 47150.4576966120. The cubic root of 2223165661 is about 1305.1405261589.

Adding to 2223165661 its reverse (1665613222), we get a palindrome (3888778883).

The spelling of 2223165661 in words is "two billion, two hundred twenty-three million, one hundred sixty-five thousand, six hundred sixty-one".