66734007333893 has 2 divisors, whose sum is σ = 66734007333894. Its totient is φ = 66734007333892.

The previous prime is 66734007333887. The next prime is 66734007333919. The reversal of 66734007333893 is 39833370043766.

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., 66655843475809 + 78163858084 = 8164303^2 + 279578^2 .

It is a cyclic number.

It is not a de Polignac number, because 66734007333893 - 2¹² = 66734007329797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66734007333883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33367003666946 + 33367003666947.

It is an arithmetic number, because the mean of its divisors is an integer number (33367003666947).

Almost surely, 2^{66734007333893} is an apocalyptic number.

It is an amenable number.

66734007333893 is a deficient number, since it is larger than the sum of its proper divisors (1).

66734007333893 is an equidigital number, since it uses as much as digits as its factorization.

66734007333893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123451776, while the sum is 62.

The spelling of 66734007333893 in words is "sixty-six trillion, seven hundred thirty-four billion, seven million, three hundred thirty-three thousand, eight hundred ninety-three".