133666505604611 has 4 divisors (see below), whose sum is σ = 152761720690992. Its totient is φ = 114571290518232.

The previous prime is 133666505604607. The next prime is 133666505604647. The reversal of 133666505604611 is 116406505666331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133666505604611 - 2² = 133666505604607 is a prime.

It is a super-2 number, since 2×133666505604611² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133666505604691) 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 in 3 ways as a sum of consecutive naturals, for example, 9547607543180 + ... + 9547607543193.

It is an arithmetic number, because the mean of its divisors is an integer number (38190430172748).

Almost surely, 2^{133666505604611} is an apocalyptic number.

133666505604611 is a deficient number, since it is larger than the sum of its proper divisors (19095215086381).

133666505604611 is an equidigital number, since it uses as much as digits as its factorization.

133666505604611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19095215086380.

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 133666505604611 in words is "one hundred thirty-three trillion, six hundred sixty-six billion, five hundred five million, six hundred four thousand, six hundred eleven".