22666551 has 4 divisors (see below), whose sum is σ = 30222072. Its totient is φ = 15111032.

The previous prime is 22666541. The next prime is 22666571. The reversal of 22666551 is 15566622.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22666551 - 2⁵ = 22666519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22666531) 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, 3777756 + ... + 3777761.

It is an arithmetic number, because the mean of its divisors is an integer number (7555518).

Almost surely, 2^22666551 is an apocalyptic number.

22666551 is a deficient number, since it is larger than the sum of its proper divisors (7555521).

22666551 is an equidigital number, since it uses as much as digits as its factorization.

22666551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7555520.

The product of its digits is 21600, while the sum is 33.

The square root of 22666551 is about 4760.9401382500. The cubic root of 22666551 is about 283.0056769038.

The spelling of 22666551 in words is "twenty-two million, six hundred sixty-six thousand, five hundred fifty-one".