22056126561666 has 40 divisors (see below), whose sum is σ = 49428633562704. Its totient is φ = 7351064505720.

The previous prime is 22056126561607. The next prime is 22056126561691. The reversal of 22056126561666 is 66616562165022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7830120 + ... + 10267571.

Almost surely, 2^{22056126561666} is an apocalyptic number.

22056126561666 is an abundant number, since it is smaller than the sum of its proper divisors (27372507001038).

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

22056126561666 is a wasteful number, since it uses less digits than its factorization.

22056126561666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18105228 (or 18105219 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 22056126561666 in words is "twenty-two trillion, fifty-six billion, one hundred twenty-six million, five hundred sixty-one thousand, six hundred sixty-six".