133266577781 has 2 divisors, whose sum is σ = 133266577782. Its totient is φ = 133266577780.

The previous prime is 133266577727. The next prime is 133266577883. The reversal of 133266577781 is 187775662331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124584997156 + 8681580625 = 352966^2 + 93175^2 .

It is a cyclic number.

It is not a de Polignac number, because 133266577781 - 2¹⁴ = 133266561397 is a prime.

It is a super-2 number, since 2×133266577781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133266577711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66633288890 + 66633288891.

It is an arithmetic number, because the mean of its divisors is an integer number (66633288891).

Almost surely, 2^133266577781 is an apocalyptic number.

It is an amenable number.

133266577781 is a deficient number, since it is larger than the sum of its proper divisors (1).

133266577781 is an equidigital number, since it uses as much as digits as its factorization.

133266577781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8890560, while the sum is 56.

The spelling of 133266577781 in words is "one hundred thirty-three billion, two hundred sixty-six million, five hundred seventy-seven thousand, seven hundred eighty-one".