66734124801173 has 2 divisors, whose sum is σ = 66734124801174. Its totient is φ = 66734124801172.

The previous prime is 66734124801139. The next prime is 66734124801263. The reversal of 66734124801173 is 37110842143766.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50121840583684 + 16612284217489 = 7079678^2 + 4075817^2 .

It is a cyclic number.

It is not a de Polignac number, because 66734124801173 - 2¹² = 66734124797077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66734124801103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33367062400586 + 33367062400587.

It is an arithmetic number, because the mean of its divisors is an integer number (33367062400587).

Almost surely, 2^{66734124801173} is an apocalyptic number.

It is an amenable number.

66734124801173 is a deficient number, since it is larger than the sum of its proper divisors (1).

66734124801173 is an equidigital number, since it uses as much as digits as its factorization.

66734124801173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 66734124801173 in words is "sixty-six trillion, seven hundred thirty-four billion, one hundred twenty-four million, eight hundred one thousand, one hundred seventy-three".