42066666013 has 2 divisors, whose sum is σ = 42066666014. Its totient is φ = 42066666012.

The previous prime is 42066665957. The next prime is 42066666067. The reversal of 42066666013 is 31066666024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25940967844 + 16125698169 = 161062^2 + 126987^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42066666013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42066666113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21033333006 + 21033333007.

It is an arithmetic number, because the mean of its divisors is an integer number (21033333007).

Almost surely, 2^42066666013 is an apocalyptic number.

It is an amenable number.

42066666013 is a deficient number, since it is larger than the sum of its proper divisors (1).

42066666013 is an equidigital number, since it uses as much as digits as its factorization.

42066666013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 42066666013 in words is "forty-two billion, sixty-six million, six hundred sixty-six thousand, thirteen".