133665566331 has 8 divisors (see below), whose sum is σ = 194422641984. Its totient is φ = 81009434120.

The previous prime is 133665566327. The next prime is 133665566393.

133665566331 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133665566331 - 2² = 133665566327 is a prime.

It is a super-2 number, since 2×133665566331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133665566231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2025235821 + ... + 2025235886.

It is an arithmetic number, because the mean of its divisors is an integer number (24302830248).

Almost surely, 2^133665566331 is an apocalyptic number.

133665566331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133665566331 is a deficient number, since it is larger than the sum of its proper divisors (60757075653).

133665566331 is a wasteful number, since it uses less digits than its factorization.

133665566331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050471721.

The product of its digits is 2624400, while the sum is 48.

It can be divided in two parts, 133665 and 566331, that added together give a palindrome (699996).

The spelling of 133665566331 in words is "one hundred thirty-three billion, six hundred sixty-five million, five hundred sixty-six thousand, three hundred thirty-one".