2166176256 has 80 divisors (see below), whose sum is σ = 5905214304. Its totient is φ = 705245184.

The previous prime is 2166176219. The next prime is 2166176321. The reversal of 2166176256 is 6526716612.

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, 49650 + ... + 82446.

Almost surely, 2^2166176256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2166176256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2952607152).

2166176256 is an abundant number, since it is smaller than the sum of its proper divisors (3739038048).

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

2166176256 is an equidigital number, since it uses as much as digits as its factorization.

2166176256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32861 (or 32845 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 2166176256 is about 46542.1986588515. The cubic root of 2166176256 is about 1293.8917100998.

The spelling of 2166176256 in words is "two billion, one hundred sixty-six million, one hundred seventy-six thousand, two hundred fifty-six".