2166522443226 has 48 divisors (see below), whose sum is σ = 4697753860800. Its totient is φ = 721617159744.

The previous prime is 2166522443221. The next prime is 2166522443263. The reversal of 2166522443226 is 6223442256612.

2166522443226 is a `hidden beast` number, since 2 + 1 + 66 + 522 + 4 + 43 + 2 + 26 = 666.

It is not an unprimeable number, because it can be changed into a prime (2166522443221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178941865 + ... + 178953971.

It is an arithmetic number, because the mean of its divisors is an integer number (97869872100).

Almost surely, 2^{2166522443226} is an apocalyptic number.

2166522443226 is an abundant number, since it is smaller than the sum of its proper divisors (2531231417574).

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

2166522443226 is a wasteful number, since it uses less digits than its factorization.

2166522443226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18963 (or 18960 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

Adding to 2166522443226 its reverse (6223442256612), we get a palindrome (8389964699838).

The spelling of 2166522443226 in words is "two trillion, one hundred sixty-six billion, five hundred twenty-two million, four hundred forty-three thousand, two hundred twenty-six".