133333366666681 has 2 divisors, whose sum is σ = 133333366666682. Its totient is φ = 133333366666680.

The previous prime is 133333366666579. The next prime is 133333366666693. The reversal of 133333366666681 is 186666663333331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121537748141056 + 11795618525625 = 11024416^2 + 3434475^2 .

It is a cyclic number.

It is not a de Polignac number, because 133333366666681 - 2²³ = 133333358278073 is a prime.

It is a super-2 number, since 2×133333366666681² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133333366664681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66666683333340 + 66666683333341.

It is an arithmetic number, because the mean of its divisors is an integer number (66666683333341).

Almost surely, 2^{133333366666681} is an apocalyptic number.

It is an amenable number.

133333366666681 is a deficient number, since it is larger than the sum of its proper divisors (1).

133333366666681 is an equidigital number, since it uses as much as digits as its factorization.

133333366666681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272097792, while the sum is 64.

The spelling of 133333366666681 in words is "one hundred thirty-three trillion, three hundred thirty-three billion, three hundred sixty-six million, six hundred sixty-six thousand, six hundred eighty-one".