66373739923 has 2 divisors, whose sum is σ = 66373739924. Its totient is φ = 66373739922.

The previous prime is 66373739899. The next prime is 66373739941. The reversal of 66373739923 is 32993737366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66373739923 is a prime.

It is not a weakly prime, because it can be changed into another prime (66373739723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33186869961 + 33186869962.

It is an arithmetic number, because the mean of its divisors is an integer number (33186869962).

Almost surely, 2^66373739923 is an apocalyptic number.

66373739923 is a deficient number, since it is larger than the sum of its proper divisors (1).

66373739923 is an equidigital number, since it uses as much as digits as its factorization.

66373739923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23147208, while the sum is 58.

The spelling of 66373739923 in words is "sixty-six billion, three hundred seventy-three million, seven hundred thirty-nine thousand, nine hundred twenty-three".