1222233445566 has 96 divisors (see below), whose sum is σ = 3054864384000. Its totient is φ = 345938003712.

The previous prime is 1222233445553. The next prime is 1222233445567. The reversal of 1222233445566 is 6655443322221.

1222233445566 is a `hidden beast` number, since 1 + 2 + 2 + 22 + 33 + 44 + 556 + 6 = 666.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222233445567) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28440291 + ... + 28483233.

It is an arithmetic number, because the mean of its divisors is an integer number (31821504000).

Almost surely, 2^{1222233445566} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222233445566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527432192000).

1222233445566 is an abundant number, since it is smaller than the sum of its proper divisors (1832630938434).

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

1222233445566 is a wasteful number, since it uses less digits than its factorization.

1222233445566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45070 (or 45067 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 45.

Adding to 1222233445566 its reverse (6655443322221), we get a palindrome (7877676767787).

The spelling of 1222233445566 in words is "one trillion, two hundred twenty-two billion, two hundred thirty-three million, four hundred forty-five thousand, five hundred sixty-six".