166016220 has 96 divisors (see below), whose sum is σ = 502806528. Its totient is φ = 40768512.

The previous prime is 166016177. The next prime is 166016233. The reversal of 166016220 is 22610661.

It is a super-2 number, since 2×166016220² = 55122770606176800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46209 + ... + 49671.

It is an arithmetic number, because the mean of its divisors is an integer number (5237568).

Almost surely, 2^166016220 is an apocalyptic number.

166016220 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 166016220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251403264).

166016220 is an abundant number, since it is smaller than the sum of its proper divisors (336790308).

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

166016220 is a wasteful number, since it uses less digits than its factorization.

166016220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539 (or 3537 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 166016220 is about 12884.7281694260. The cubic root of 166016220 is about 549.6043656122.

Adding to 166016220 its reverse (22610661), we get a palindrome (188626881).

The spelling of 166016220 in words is "one hundred sixty-six million, sixteen thousand, two hundred twenty".