2023331661 has 12 divisors (see below), whose sum is σ = 3147404988. Its totient is φ = 1245127104.

The previous prime is 2023331581. The next prime is 2023331683. The reversal of 2023331661 is 1661333202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 234549225 + 1788782436 = 15315^2 + 42294^2 .

It is not a de Polignac number, because 2023331661 - 2⁷ = 2023331533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2023333661) 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 11 ways as a sum of consecutive naturals, for example, 8646600 + ... + 8646833.

It is an arithmetic number, because the mean of its divisors is an integer number (262283749).

Almost surely, 2^2023331661 is an apocalyptic number.

It is an amenable number.

2023331661 is a deficient number, since it is larger than the sum of its proper divisors (1124073327).

2023331661 is a wasteful number, since it uses less digits than its factorization.

2023331661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17293452 (or 17293449 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 2023331661 is about 44981.4590803811. The cubic root of 2023331661 is about 1264.8014625901.

Adding to 2023331661 its reverse (1661333202), we get a palindrome (3684664863).

The spelling of 2023331661 in words is "two billion, twenty-three million, three hundred thirty-one thousand, six hundred sixty-one".