133766172 has 18 divisors (see below), whose sum is σ = 338131248. Its totient is φ = 44588712.

The previous prime is 133766167. The next prime is 133766189. The reversal of 133766172 is 271667331.

133766172 is a `hidden beast` number, since 1 + 3 + 37 + 6 + 617 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3715727 = 133766172 / (1 + 3 + 3 + 7 + 6 + 6 + 1 + 7 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1857828 + ... + 1857899.

Almost surely, 2^133766172 is an apocalyptic number.

133766172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133766172 is an abundant number, since it is smaller than the sum of its proper divisors (204365076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133766172 is a wasteful number, since it uses less digits than its factorization.

133766172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715737 (or 3715732 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 133766172 is about 11565.7326616172. The cubic root of 133766172 is about 511.4251717291.

The spelling of 133766172 in words is "one hundred thirty-three million, seven hundred sixty-six thousand, one hundred seventy-two".