66223123 has 2 divisors, whose sum is σ = 66223124. Its totient is φ = 66223122.

The previous prime is 66223121. The next prime is 66223133. The reversal of 66223123 is 32132266.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66223123 - 2¹ = 66223121 is a prime.

Together with 66223121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66223121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33111561 + 33111562.

It is an arithmetic number, because the mean of its divisors is an integer number (33111562).

Almost surely, 2^66223123 is an apocalyptic number.

66223123 is a deficient number, since it is larger than the sum of its proper divisors (1).

66223123 is an equidigital number, since it uses as much as digits as its factorization.

66223123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 66223123 is about 8137.7590895774. The cubic root of 66223123 is about 404.5788906467.

Adding to 66223123 its reverse (32132266), we get a palindrome (98355389).

The spelling of 66223123 in words is "sixty-six million, two hundred twenty-three thousand, one hundred twenty-three".