22421666 has 4 divisors (see below), whose sum is σ = 33632502. Its totient is φ = 11210832.

The previous prime is 22421599. The next prime is 22421677. The reversal of 22421666 is 66612422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19616041 + 2805625 = 4429^2 + 1675^2 .

It is a super-2 number, since 2×22421666² = 1005462212431112, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605415 + ... + 5605418.

Almost surely, 2^22421666 is an apocalyptic number.

22421666 is a deficient number, since it is larger than the sum of its proper divisors (11210836).

22421666 is a wasteful number, since it uses less digits than its factorization.

22421666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210835.

The product of its digits is 6912, while the sum is 29.

The square root of 22421666 is about 4735.1521622858. The cubic root of 22421666 is about 281.9828049808.

The spelling of 22421666 in words is "twenty-two million, four hundred twenty-one thousand, six hundred sixty-six".