66913731041 has 2 divisors, whose sum is σ = 66913731042. Its totient is φ = 66913731040.

The previous prime is 66913731037. The next prime is 66913731047. The reversal of 66913731041 is 14013731966.

It is a happy number.

66913731041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46027411600 + 20886319441 = 214540^2 + 144521^2 .

It is a cyclic number.

It is not a de Polignac number, because 66913731041 - 2² = 66913731037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66913731041.

It is not a weakly prime, because it can be changed into another prime (66913731047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33456865520 + 33456865521.

It is an arithmetic number, because the mean of its divisors is an integer number (33456865521).

Almost surely, 2^66913731041 is an apocalyptic number.

It is an amenable number.

66913731041 is a deficient number, since it is larger than the sum of its proper divisors (1).

66913731041 is an equidigital number, since it uses as much as digits as its factorization.

66913731041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 66913731041 in words is "sixty-six billion, nine hundred thirteen million, seven hundred thirty-one thousand, forty-one".