22401066 has 8 divisors (see below), whose sum is σ = 44802144. Its totient is φ = 7467020.

The previous prime is 22401037. The next prime is 22401077. The reversal of 22401066 is 66010422.

It is a happy number.

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

22401066 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866750 + ... + 1866761.

It is an arithmetic number, because the mean of its divisors is an integer number (5600268).

Almost surely, 2^22401066 is an apocalyptic number.

22401066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22401066 is a wasteful number, since it uses less digits than its factorization.

22401066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733516.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 22401066 is about 4732.9764419443. The cubic root of 22401066 is about 281.8964208905.

Adding to 22401066 its reverse (66010422), we get a palindrome (88411488).

The spelling of 22401066 in words is "twenty-two million, four hundred one thousand, sixty-six".