66736707073943 has 2 divisors, whose sum is σ = 66736707073944. Its totient is φ = 66736707073942.

The previous prime is 66736707073937. The next prime is 66736707073963. The reversal of 66736707073943 is 34937070763766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66736707073943 - 2³⁰ = 66735633332119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66736707073963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368353536971 + 33368353536972.

It is an arithmetic number, because the mean of its divisors is an integer number (33368353536972).

Almost surely, 2^{66736707073943} is an apocalyptic number.

66736707073943 is a deficient number, since it is larger than the sum of its proper divisors (1).

66736707073943 is an equidigital number, since it uses as much as digits as its factorization.

66736707073943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504094752, while the sum is 68.

The spelling of 66736707073943 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred seven million, seventy-three thousand, nine hundred forty-three".