66770814071329 has 2 divisors, whose sum is σ = 66770814071330. Its totient is φ = 66770814071328.

The previous prime is 66770814071303. The next prime is 66770814071393. The reversal of 66770814071329 is 92317041807766.

66770814071329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66521118978304 + 249695093025 = 8156048^2 + 499695^2 .

It is a cyclic number.

It is not a de Polignac number, because 66770814071329 - 2³¹ = 66768666587681 is a prime.

It is a super-2 number, since 2×66770814071329² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66770814051329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33385407035664 + 33385407035665.

It is an arithmetic number, because the mean of its divisors is an integer number (33385407035665).

Almost surely, 2^{66770814071329} is an apocalyptic number.

It is an amenable number.

66770814071329 is a deficient number, since it is larger than the sum of its proper divisors (1).

66770814071329 is an equidigital number, since it uses as much as digits as its factorization.

66770814071329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 66770814071329 in words is "sixty-six trillion, seven hundred seventy billion, eight hundred fourteen million, seventy-one thousand, three hundred twenty-nine".