165666006 has 64 divisors (see below), whose sum is σ = 404870400. Its totient is φ = 49795200.

The previous prime is 165666001. The next prime is 165666013. The reversal of 165666006 is 600666561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165666001) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 76750 + ... + 78878.

It is an arithmetic number, because the mean of its divisors is an integer number (6326100).

Almost surely, 2^165666006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165666006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202435200).

165666006 is an abundant number, since it is smaller than the sum of its proper divisors (239204394).

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

165666006 is a wasteful number, since it uses less digits than its factorization.

165666006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282 (or 2276 counting only the distinct ones).

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

The square root of 165666006 is about 12871.1307195600. The cubic root of 165666006 is about 549.2176269989.

The spelling of 165666006 in words is "one hundred sixty-five million, six hundred sixty-six thousand, six".