133412661 has 12 divisors (see below), whose sum is σ = 202849920. Its totient is φ = 84260520.

The previous prime is 133412641. The next prime is 133412687. The reversal of 133412661 is 166214331.

It is not a de Polignac number, because 133412661 - 2²⁵ = 99858229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133412641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 389925 + ... + 390266.

It is an arithmetic number, because the mean of its divisors is an integer number (16904160).

Almost surely, 2^133412661 is an apocalyptic number.

It is an amenable number.

133412661 is a deficient number, since it is larger than the sum of its proper divisors (69437259).

133412661 is a wasteful number, since it uses less digits than its factorization.

133412661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780216 (or 780213 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 133412661 is about 11550.4398617542. The cubic root of 133412661 is about 510.9742507415.

Adding to 133412661 its reverse (166214331), we get a palindrome (299626992).

The spelling of 133412661 in words is "one hundred thirty-three million, four hundred twelve thousand, six hundred sixty-one".