166066503 has 8 divisors (see below), whose sum is σ = 221519616. Its totient is φ = 110662200.

The previous prime is 166066501. The next prime is 166066529. The reversal of 166066503 is 305660661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166066503 - 2¹ = 166066501 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166066501) 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, 3343 + ... + 18528.

It is an arithmetic number, because the mean of its divisors is an integer number (27689952).

Almost surely, 2^166066503 is an apocalyptic number.

166066503 is a deficient number, since it is larger than the sum of its proper divisors (55453113).

166066503 is a wasteful number, since it uses less digits than its factorization.

166066503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24405.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 166066503 is about 12886.6792852154. The cubic root of 166066503 is about 549.6598480759.

The spelling of 166066503 in words is "one hundred sixty-six million, sixty-six thousand, five hundred three".