166265216 has 64 divisors (see below), whose sum is σ = 359484720. Its totient is φ = 76142592.

The previous prime is 166265201. The next prime is 166265227. The reversal of 166265216 is 612562661.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270926 + ... + 271538.

Almost surely, 2^166265216 is an apocalyptic number.

166265216 is a gapful number since it is divisible by the number (16) 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 166265216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179742360).

166265216 is an abundant number, since it is smaller than the sum of its proper divisors (193219504).

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

166265216 is a wasteful number, since it uses less digits than its factorization.

166265216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 791 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 166265216 is about 12894.3869958986. The cubic root of 166265216 is about 549.8789992770.

The spelling of 166265216 in words is "one hundred sixty-six million, two hundred sixty-five thousand, two hundred sixteen".