22240066 has 4 divisors (see below), whose sum is σ = 33360102. Its totient is φ = 11120032.

The previous prime is 22240037. The next prime is 22240087. The reversal of 22240066 is 66004222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66004222 = 2 ⋅33002111.

It can be written as a sum of positive squares in only one way, i.e., 22137025 + 103041 = 4705^2 + 321^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560015 + ... + 5560018.

Almost surely, 2^22240066 is an apocalyptic number.

22240066 is a deficient number, since it is larger than the sum of its proper divisors (11120036).

22240066 is a wasteful number, since it uses less digits than its factorization.

22240066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120035.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 22240066 is about 4715.9374465741. The cubic root of 22240066 is about 281.2194517603.

Adding to 22240066 its reverse (66004222), we get a palindrome (88244288).

The spelling of 22240066 in words is "twenty-two million, two hundred forty thousand, sixty-six".