22222222166726 has 16 divisors (see below), whose sum is σ = 36219581122560. Its totient is φ = 10186757189640.

The previous prime is 22222222166717. The next prime is 22222222166743. The reversal of 22222222166726 is 62766122222222.

It is a Curzon number.

It is a congruent number.

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, 9432181406 + ... + 9432183761.

It is an arithmetic number, because the mean of its divisors is an integer number (2263723820160).

Almost surely, 2^{22222222166726} is an apocalyptic number.

22222222166726 is a deficient number, since it is larger than the sum of its proper divisors (13997358955834).

22222222166726 is a wasteful number, since it uses less digits than its factorization.

22222222166726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18864365219.

The product of its digits is 774144, while the sum is 44.

Adding to 22222222166726 its reverse (62766122222222), we get a palindrome (84988344388948).

The spelling of 22222222166726 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred sixty-six thousand, seven hundred twenty-six".