133666145 has 8 divisors (see below), whose sum is σ = 164129856. Its totient is φ = 104445936.

The previous prime is 133666129. The next prime is 133666151. The reversal of 133666145 is 541666331.

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 133666145 - 2⁴ = 133666129 is a prime.

It is a super-2 number, since 2×133666145² = 35733276638322050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310637 + ... + 311066.

It is an arithmetic number, because the mean of its divisors is an integer number (20516232).

Almost surely, 2^133666145 is an apocalyptic number.

It is an amenable number.

133666145 is a deficient number, since it is larger than the sum of its proper divisors (30463711).

133666145 is an equidigital number, since it uses as much as digits as its factorization.

133666145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621751.

The product of its digits is 38880, while the sum is 35.

The square root of 133666145 is about 11561.4075700150. The cubic root of 133666145 is about 511.2976629543.

The spelling of 133666145 in words is "one hundred thirty-three million, six hundred sixty-six thousand, one hundred forty-five".