166066443 has 12 divisors (see below), whose sum is σ = 248758328. Its totient is φ = 110710800.

The previous prime is 166066427. The next prime is 166066447. The reversal of 166066443 is 344660661.

166066443 is a `hidden beast` number, since 1 + 6 + 6 + 0 + 6 + 644 + 3 = 666.

It is not a de Polignac number, because 166066443 - 2⁴ = 166066427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166066398 and 166066407.

It is not an unprimeable number, because it can be changed into a prime (166066447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341458 + ... + 341943.

Almost surely, 2^166066443 is an apocalyptic number.

166066443 is a deficient number, since it is larger than the sum of its proper divisors (82691885).

166066443 is an frugal number, since it uses more digits than its factorization.

166066443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683416 (or 683404 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 166066443 is about 12886.6769572299. The cubic root of 166066443 is about 549.6597818783.

The spelling of 166066443 in words is "one hundred sixty-six million, sixty-six thousand, four hundred forty-three".