22222222166664 has 192 divisors, whose sum is σ = 68998186483200. Its totient is φ = 6617038521600.

The previous prime is 22222222166609. The next prime is 22222222166699. The reversal of 22222222166664 is 46666122222222.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8687107 + ... + 10950354.

It is an arithmetic number, because the mean of its divisors is an integer number (359365554600).

Almost surely, 2^{22222222166664} is an apocalyptic number.

22222222166664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22222222166664 is an abundant number, since it is smaller than the sum of its proper divisors (46775964316536).

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

22222222166664 is a wasteful number, since it uses less digits than its factorization.

22222222166664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19637533 (or 19637510 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 45.

Adding to 22222222166664 its reverse (46666122222222), we get a palindrome (68888344388886).

The spelling of 22222222166664 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred sixty-six thousand, six hundred sixty-four".