66124081139 has 2 divisors, whose sum is σ = 66124081140. Its totient is φ = 66124081138.

The previous prime is 66124081129. The next prime is 66124081157. The reversal of 66124081139 is 93118042166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66124081139 - 2²⁸ = 65855645683 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 66124081096 and 66124081105.

It is not a weakly prime, because it can be changed into another prime (66124081129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33062040569 + 33062040570.

It is an arithmetic number, because the mean of its divisors is an integer number (33062040570).

Almost surely, 2^66124081139 is an apocalyptic number.

66124081139 is a deficient number, since it is larger than the sum of its proper divisors (1).

66124081139 is an equidigital number, since it uses as much as digits as its factorization.

66124081139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 66124081139 in words is "sixty-six billion, one hundred twenty-four million, eighty-one thousand, one hundred thirty-nine".