66736740073417 has 2 divisors, whose sum is σ = 66736740073418. Its totient is φ = 66736740073416.

The previous prime is 66736740073379. The next prime is 66736740073427. The reversal of 66736740073417 is 71437004763766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66388290705801 + 348449367616 = 8147901^2 + 590296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66736740073417 is a prime.

It is not a weakly prime, because it can be changed into another prime (66736740073427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368370036708 + 33368370036709.

It is an arithmetic number, because the mean of its divisors is an integer number (33368370036709).

Almost surely, 2^{66736740073417} is an apocalyptic number.

It is an amenable number.

66736740073417 is a deficient number, since it is larger than the sum of its proper divisors (1).

66736740073417 is an equidigital number, since it uses as much as digits as its factorization.

66736740073417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74680704, while the sum is 61.

The spelling of 66736740073417 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred forty million, seventy-three thousand, four hundred seventeen".