22021110666 has 24 divisors (see below), whose sum is σ = 47778793920. Its totient is φ = 7330156776.

The previous prime is 22021110659. The next prime is 22021110691. The reversal of 22021110666 is 66601112022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 837820 + ... + 863703.

It is an arithmetic number, because the mean of its divisors is an integer number (1990783080).

Almost surely, 2^22021110666 is an apocalyptic number.

22021110666 is an abundant number, since it is smaller than the sum of its proper divisors (25757683254).

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

22021110666 is a wasteful number, since it uses less digits than its factorization.

22021110666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702250 (or 1702247 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 22021110666 its reverse (66601112022), we get a palindrome (88622222688).

The spelling of 22021110666 in words is "twenty-two billion, twenty-one million, one hundred ten thousand, six hundred sixty-six".