66868682941 has 2 divisors, whose sum is σ = 66868682942. Its totient is φ = 66868682940.

The previous prime is 66868682911. The next prime is 66868682957. The reversal of 66868682941 is 14928686866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65010210841 + 1858472100 = 254971^2 + 43110^2 .

It is a cyclic number.

It is not a de Polignac number, because 66868682941 - 2⁷ = 66868682813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66868682911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33434341470 + 33434341471.

It is an arithmetic number, because the mean of its divisors is an integer number (33434341471).

Almost surely, 2^66868682941 is an apocalyptic number.

It is an amenable number.

66868682941 is a deficient number, since it is larger than the sum of its proper divisors (1).

66868682941 is an equidigital number, since it uses as much as digits as its factorization.

66868682941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47775744, while the sum is 64.

The spelling of 66868682941 in words is "sixty-six billion, eight hundred sixty-eight million, six hundred eighty-two thousand, nine hundred forty-one".