2166622336 has 16 divisors (see below), whose sum is σ = 4316318190. Its totient is φ = 1083311104.

The previous prime is 2166622331. The next prime is 2166622369. The reversal of 2166622336 is 6332266612.

It can be written as a sum of positive squares in only one way, i.e., 2083009600 + 83612736 = 45640^2 + 9144^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 2166622295 and 2166622304.

It is not an unprimeable number, because it can be changed into a prime (2166622331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8463241 + ... + 8463496.

Almost surely, 2^2166622336 is an apocalyptic number.

It is an amenable number.

2166622336 is a deficient number, since it is larger than the sum of its proper divisors (2149695854).

2166622336 is an equidigital number, since it uses as much as digits as its factorization.

2166622336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16926751 (or 16926739 counting only the distinct ones).

The product of its digits is 93312, while the sum is 37.

The square root of 2166622336 is about 46546.9906223807. The cubic root of 2166622336 is about 1293.9805209091.

Adding to 2166622336 its reverse (6332266612), we get a palindrome (8498888948).

The spelling of 2166622336 in words is "two billion, one hundred sixty-six million, six hundred twenty-two thousand, three hundred thirty-six".