133668145 has 16 divisors (see below), whose sum is σ = 174363840. Its totient is φ = 97781184.

The previous prime is 133668113. The next prime is 133668167. The reversal of 133668145 is 541866331.

It is a cyclic number.

It is not a de Polignac number, because 133668145 - 2⁵ = 133668113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2655 + ... + 16564.

It is an arithmetic number, because the mean of its divisors is an integer number (10897740).

Almost surely, 2^133668145 is an apocalyptic number.

It is an amenable number.

133668145 is a deficient number, since it is larger than the sum of its proper divisors (40695695).

133668145 is a wasteful number, since it uses less digits than its factorization.

133668145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19344.

The product of its digits is 51840, while the sum is 37.

The square root of 133668145 is about 11561.4940643500. The cubic root of 133668145 is about 511.3002130646.

The spelling of 133668145 in words is "one hundred thirty-three million, six hundred sixty-eight thousand, one hundred forty-five".