22666647 has 4 divisors (see below), whose sum is σ = 30222200. Its totient is φ = 15111096.

The previous prime is 22666621. The next prime is 22666663. The reversal of 22666647 is 74666622.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22666647 - 2⁷ = 22666519 is a prime.

It is a Duffinian number.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22666687) 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, 3777772 + ... + 3777777.

It is an arithmetic number, because the mean of its divisors is an integer number (7555550).

Almost surely, 2^22666647 is an apocalyptic number.

22666647 is a deficient number, since it is larger than the sum of its proper divisors (7555553).

22666647 is an equidigital number, since it uses as much as digits as its factorization.

22666647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7555552.

The product of its digits is 145152, while the sum is 39.

The square root of 22666647 is about 4760.9502202817. The cubic root of 22666647 is about 283.0060764427.

The spelling of 22666647 in words is "twenty-two million, six hundred sixty-six thousand, six hundred forty-seven".