22207666 has 8 divisors (see below), whose sum is σ = 35873964. Its totient is φ = 10249680.

The previous prime is 22207657. The next prime is 22207667. The reversal of 22207666 is 66670222.

It can be written as a sum of positive squares in 2 ways, for example, as 20061441 + 2146225 = 4479^2 + 1465^2 .

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

It is not an unprimeable number, because it can be changed into a prime (22207667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427045 + ... + 427096.

Almost surely, 2^22207666 is an apocalyptic number.

22207666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

22207666 is a deficient number, since it is larger than the sum of its proper divisors (13666298).

22207666 is a wasteful number, since it uses less digits than its factorization.

22207666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854156.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 22207666 is about 4712.5010344826. The cubic root of 22207666 is about 281.0828223926.

Adding to 22207666 its reverse (66670222), we get a palindrome (88877888).

The spelling of 22207666 in words is "twenty-two million, two hundred seven thousand, six hundred sixty-six".