166066331 has 8 divisors (see below), whose sum is σ = 170442144. Its totient is φ = 161736640.

The previous prime is 166066309. The next prime is 166066357. The reversal of 166066331 is 133660661.

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 166066331 - 2¹⁰ = 166065307 is a prime.

It is a super-2 number, since 2×166066331² = 55156052583603122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166065331) by changing a digit.

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, 4175 + ... + 18696.

It is an arithmetic number, because the mean of its divisors is an integer number (21305268).

Almost surely, 2^166066331 is an apocalyptic number.

166066331 is a deficient number, since it is larger than the sum of its proper divisors (4375813).

166066331 is a wasteful number, since it uses less digits than its factorization.

166066331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23061.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 166066331 is about 12886.6726116558. The cubic root of 166066331 is about 549.6596583095.

The spelling of 166066331 in words is "one hundred sixty-six million, sixty-six thousand, three hundred thirty-one".