22206666 has 16 divisors (see below), whose sum is σ = 45497088. Its totient is φ = 7221600.

The previous prime is 22206643. The next prime is 22206671. The reversal of 22206666 is 66660222.

22206666 is a modest number, since divided by 6666 gives 2220 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44890 + ... + 45381.

It is an arithmetic number, because the mean of its divisors is an integer number (2843568).

Almost surely, 2^22206666 is an apocalyptic number.

22206666 is an abundant number, since it is smaller than the sum of its proper divisors (23290422).

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

22206666 is a wasteful number, since it uses less digits than its factorization.

22206666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90317.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 22206666 is about 4712.3949325157. The cubic root of 22206666 is about 281.0786033234.

Adding to 22206666 its reverse (66660222), we get a palindrome (88866888).

The spelling of 22206666 in words is "twenty-two million, two hundred six thousand, six hundred sixty-six".