22666447 has 4 divisors (see below), whose sum is σ = 22686120. Its totient is φ = 22646776.

The previous prime is 22666439. The next prime is 22666453. The reversal of 22666447 is 74466622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74466622 = 2 ⋅37233311.

It is a cyclic number.

It is not a de Polignac number, because 22666447 - 2³ = 22666439 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 (22666417) 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, 7993 + ... + 10450.

It is an arithmetic number, because the mean of its divisors is an integer number (5671530).

Almost surely, 2^22666447 is an apocalyptic number.

22666447 is a deficient number, since it is larger than the sum of its proper divisors (19673).

22666447 is a wasteful number, since it uses less digits than its factorization.

22666447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19672.

The product of its digits is 96768, while the sum is 37.

The square root of 22666447 is about 4760.9292160250. The cubic root of 22666447 is about 283.0052440687.

The spelling of 22666447 in words is "twenty-two million, six hundred sixty-six thousand, four hundred forty-seven".