133166305 has 8 divisors (see below), whose sum is σ = 159924672. Its totient is φ = 106449648.

The previous prime is 133166261. The next prime is 133166323. The reversal of 133166305 is 503661331.

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 133166305 - 2¹⁷ = 133035233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2907 + ... + 16576.

It is an arithmetic number, because the mean of its divisors is an integer number (19990584).

Almost surely, 2^133166305 is an apocalyptic number.

It is an amenable number.

133166305 is a deficient number, since it is larger than the sum of its proper divisors (26758367).

133166305 is a wasteful number, since it uses less digits than its factorization.

133166305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20855.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 133166305 is about 11539.7705783087. The cubic root of 133166305 is about 510.6595401429.

The spelling of 133166305 in words is "one hundred thirty-three million, one hundred sixty-six thousand, three hundred five".