22066881 has 4 divisors (see below), whose sum is σ = 29422512. Its totient is φ = 14711252.

The previous prime is 22066861. The next prime is 22066903. The reversal of 22066881 is 18866022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22066881 - 2¹³ = 22058689 is a prime.

It is a super-2 number, since 2×22066881² = 973894474136322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22066801) by changing a digit.

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, 3677811 + ... + 3677816.

It is an arithmetic number, because the mean of its divisors is an integer number (7355628).

Almost surely, 2^22066881 is an apocalyptic number.

It is an amenable number.

22066881 is a deficient number, since it is larger than the sum of its proper divisors (7355631).

22066881 is an equidigital number, since it uses as much as digits as its factorization.

22066881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7355630.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 22066881 is about 4697.5398880691. The cubic root of 22066881 is about 280.4875900471.

The spelling of 22066881 in words is "twenty-two million, sixty-six thousand, eight hundred eighty-one".