22066817 has 4 divisors (see below), whose sum is σ = 22088640. Its totient is φ = 22044996.

The previous prime is 22066801. The next prime is 22066859. The reversal of 22066817 is 71866022.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71866022 = 2 ⋅35933011.

It is a cyclic number.

It is not a de Polignac number, because 22066817 - 2⁴ = 22066801 is a prime.

It is a super-2 number, since 2×22066817² = 973888825022978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22066417) 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, 9317 + ... + 11442.

It is an arithmetic number, because the mean of its divisors is an integer number (5522160).

Almost surely, 2^22066817 is an apocalyptic number.

It is an amenable number.

22066817 is a deficient number, since it is larger than the sum of its proper divisors (21823).

22066817 is a wasteful number, since it uses less digits than its factorization.

22066817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21822.

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

The square root of 22066817 is about 4697.5330759879. The cubic root of 22066817 is about 280.4873188832.

The spelling of 22066817 in words is "twenty-two million, sixty-six thousand, eight hundred seventeen".