66234399923 has 2 divisors, whose sum is σ = 66234399924. Its totient is φ = 66234399922.

The previous prime is 66234399887. The next prime is 66234399953. The reversal of 66234399923 is 32999343266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66234399923 - 2¹⁴ = 66234383539 is a prime.

It is not a weakly prime, because it can be changed into another prime (66234399953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33117199961 + 33117199962.

It is an arithmetic number, because the mean of its divisors is an integer number (33117199962).

Almost surely, 2^66234399923 is an apocalyptic number.

66234399923 is a deficient number, since it is larger than the sum of its proper divisors (1).

66234399923 is an equidigital number, since it uses as much as digits as its factorization.

66234399923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11337408, while the sum is 56.

The spelling of 66234399923 in words is "sixty-six billion, two hundred thirty-four million, three hundred ninety-nine thousand, nine hundred twenty-three".