22021999966 has 8 divisors (see below), whose sum is σ = 33043303440. Its totient is φ = 11007565488.

The previous prime is 22021999963. The next prime is 22022000017. The reversal of 22021999966 is 66999912022.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021999963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709226 + ... + 1722061.

It is an arithmetic number, because the mean of its divisors is an integer number (4130412930).

Almost surely, 2^22021999966 is an apocalyptic number.

22021999966 is a deficient number, since it is larger than the sum of its proper divisors (11021303474).

22021999966 is a wasteful number, since it uses less digits than its factorization.

22021999966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3434498.

The product of its (nonzero) digits is 1889568, while the sum is 55.

The spelling of 22021999966 in words is "twenty-two billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred sixty-six".