66242123 has 2 divisors, whose sum is σ = 66242124. Its totient is φ = 66242122.

The previous prime is 66242117. The next prime is 66242159. The reversal of 66242123 is 32124266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66242123 - 2⁴ = 66242107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66242092 and 66242101.

It is not a weakly prime, because it can be changed into another prime (66242023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33121061 + 33121062.

It is an arithmetic number, because the mean of its divisors is an integer number (33121062).

Almost surely, 2^66242123 is an apocalyptic number.

66242123 is a deficient number, since it is larger than the sum of its proper divisors (1).

66242123 is an equidigital number, since it uses as much as digits as its factorization.

66242123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 26.

The square root of 66242123 is about 8138.9264034024. The cubic root of 66242123 is about 404.6175793682.

Adding to 66242123 its reverse (32124266), we get a palindrome (98366389).

The spelling of 66242123 in words is "sixty-six million, two hundred forty-two thousand, one hundred twenty-three".