133966670813 has 2 divisors, whose sum is σ = 133966670814. Its totient is φ = 133966670812.

The previous prime is 133966670743. The next prime is 133966670819. The reversal of 133966670813 is 318076669331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128624084164 + 5342586649 = 358642^2 + 73093^2 .

It is a cyclic number.

It is not a de Polignac number, because 133966670813 - 2¹⁰ = 133966669789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133966670819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66983335406 + 66983335407.

It is an arithmetic number, because the mean of its divisors is an integer number (66983335407).

Almost surely, 2^133966670813 is an apocalyptic number.

It is an amenable number.

133966670813 is a deficient number, since it is larger than the sum of its proper divisors (1).

133966670813 is an equidigital number, since it uses as much as digits as its factorization.

133966670813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 133966670813 in words is "one hundred thirty-three billion, nine hundred sixty-six million, six hundred seventy thousand, eight hundred thirteen".