166066506 has 48 divisors (see below), whose sum is σ = 383300424. Its totient is φ = 51781632.

The previous prime is 166066501. The next prime is 166066529. The reversal of 166066506 is 605660661.

It can be written as a sum of positive squares in 4 ways, for example, as 144360225 + 21706281 = 12015^2 + 4659^2 .

It is not an unprimeable number, because it can be changed into a prime (166066501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51370 + ... + 54506.

Almost surely, 2^166066506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166066506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191650212).

166066506 is an abundant number, since it is smaller than the sum of its proper divisors (217233918).

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

166066506 is a wasteful number, since it uses less digits than its factorization.

166066506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335 (or 3332 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 166066506 is about 12886.6794016147. The cubic root of 166066506 is about 549.6598513858.

The spelling of 166066506 in words is "one hundred sixty-six million, sixty-six thousand, five hundred six".