165666060 has 180 divisors, whose sum is σ = 604839312. Its totient is φ = 37848384.

The previous prime is 165666047. The next prime is 165666089. The reversal of 165666060 is 60666561.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 59 ways as a sum of consecutive naturals, for example, 78337 + ... + 80423.

Almost surely, 2^165666060 is an apocalyptic number.

165666060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165666060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302419656).

165666060 is an abundant number, since it is smaller than the sum of its proper divisors (439173252).

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

165666060 is a wasteful number, since it uses less digits than its factorization.

165666060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122 (or 2104 counting only the distinct ones).

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

The square root of 165666060 is about 12871.1328172776. The cubic root of 165666060 is about 549.2176866727.

The spelling of 165666060 in words is "one hundred sixty-five million, six hundred sixty-six thousand, sixty".