22400066 has 8 divisors (see below), whose sum is σ = 36184764. Its totient is φ = 10338480.

The previous prime is 22400057. The next prime is 22400071. The reversal of 22400066 is 66000422.

It can be written as a sum of positive squares in 2 ways, for example, as 22287841 + 112225 = 4721^2 + 335^2 .

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

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, 430745 + ... + 430796.

Almost surely, 2^22400066 is an apocalyptic number.

22400066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

22400066 is a deficient number, since it is larger than the sum of its proper divisors (13784698).

22400066 is a wasteful number, since it uses less digits than its factorization.

22400066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861556.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 22400066 is about 4732.8707989972. The cubic root of 22400066 is about 281.8922261405.

Adding to 22400066 its reverse (66000422), we get a palindrome (88400488).

The spelling of 22400066 in words is "twenty-two million, four hundred thousand, sixty-six".