22066871 has 4 divisors (see below), whose sum is σ = 22377744. Its totient is φ = 21756000.

The previous prime is 22066861. The next prime is 22066903. The reversal of 22066871 is 17866022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17866022 = 2 ⋅8933011.

It is a cyclic number.

It is not a de Polignac number, because 22066871 - 2¹⁴ = 22050487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22066801) 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, 155330 + ... + 155471.

It is an arithmetic number, because the mean of its divisors is an integer number (5594436).

Almost surely, 2^22066871 is an apocalyptic number.

22066871 is a deficient number, since it is larger than the sum of its proper divisors (310873).

22066871 is an equidigital number, since it uses as much as digits as its factorization.

22066871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310872.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 22066871 is about 4697.5388236820. The cubic root of 22066871 is about 280.4875476778.

The spelling of 22066871 in words is "twenty-two million, sixty-six thousand, eight hundred seventy-one".