22222227777766 has 8 divisors (see below), whose sum is σ = 33333749066880. Its totient is φ = 11110978088808.

The previous prime is 22222227777721. The next prime is 22222227777767. The reversal of 22222227777766 is 66777772222222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222227777767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67695366 + ... + 68022841.

It is an arithmetic number, because the mean of its divisors is an integer number (4166718633360).

Almost surely, 2^{22222227777766} is an apocalyptic number.

22222227777766 is a deficient number, since it is larger than the sum of its proper divisors (11111521289114).

22222227777766 is a wasteful number, since it uses less digits than its factorization.

22222227777766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135800078.

The product of its digits is 77446656, while the sum is 61.

Adding to 22222227777766 its reverse (66777772222222), we get a palindrome (88999999999988).

The spelling of 22222227777766 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty-seven million, seven hundred seventy-seven thousand, seven hundred sixty-six".