22305666 has 32 divisors (see below), whose sum is σ = 47442240. Its totient is φ = 6967296.

The previous prime is 22305659. The next prime is 22305697. The reversal of 22305666 is 66650322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38370 + ... + 38946.

It is an arithmetic number, because the mean of its divisors is an integer number (1482570).

Almost surely, 2^22305666 is an apocalyptic number.

22305666 is an abundant number, since it is smaller than the sum of its proper divisors (25136574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22305666 is a wasteful number, since it uses less digits than its factorization.

22305666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 22305666 is about 4722.8874642532. The cubic root of 22305666 is about 281.4956782702.

Adding to 22305666 its reverse (66650322), we get a palindrome (88955988).

The spelling of 22305666 in words is "twenty-two million, three hundred five thousand, six hundred sixty-six".