22686666 has 16 divisors (see below), whose sum is σ = 45653664. Its totient is φ = 7515504.

The previous prime is 22686659. The next prime is 22686673. The reversal of 22686666 is 66668622.

22686666 = T₄₄₄ + T₄₄₅ + ... + T₆₀₆.

It is an interprime number because it is at equal distance from previous prime (22686659) and next prime (22686673).

22686666 is a modest number, since divided by 6666 gives 2268 as remainder.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10621 + ... + 12576.

It is an arithmetic number, because the mean of its divisors is an integer number (2853354).

Almost surely, 2^22686666 is an apocalyptic number.

22686666 is an abundant number, since it is smaller than the sum of its proper divisors (22966998).

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

22686666 is a wasteful number, since it uses less digits than its factorization.

22686666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23365.

The product of its digits is 248832, while the sum is 42.

The square root of 22686666 is about 4763.0521727145. The cubic root of 22686666 is about 283.0893681555.

The spelling of 22686666 in words is "twenty-two million, six hundred eighty-six thousand, six hundred sixty-six".