133666875 has 60 divisors (see below), whose sum is σ = 250263640. Its totient is φ = 70488000.

The previous prime is 133666859. The next prime is 133666877. The reversal of 133666875 is 578666331.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 133666875 - 2⁴ = 133666859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 133666875.

It is not an unprimeable number, because it can be changed into a prime (133666877) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1501831 + ... + 1501919.

Almost surely, 2^133666875 is an apocalyptic number.

133666875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133666875 is a deficient number, since it is larger than the sum of its proper divisors (116596765).

133666875 is an frugal number, since it uses more digits than its factorization.

133666875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 97 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 133666875 is about 11561.4391405223. The cubic root of 133666875 is about 511.2985937475.

The spelling of 133666875 in words is "one hundred thirty-three million, six hundred sixty-six thousand, eight hundred seventy-five".