222005666 has 8 divisors (see below), whose sum is σ = 334402560. Its totient is φ = 110538148.

The previous prime is 222005659. The next prime is 222005677. The reversal of 222005666 is 666500222.

222005666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×222005666² = 98573031472207112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231746 + ... + 232701.

It is an arithmetic number, because the mean of its divisors is an integer number (41800320).

Almost surely, 2^222005666 is an apocalyptic number.

222005666 is a deficient number, since it is larger than the sum of its proper divisors (112396894).

222005666 is a wasteful number, since it uses less digits than its factorization.

222005666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464688.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 222005666 is about 14899.8545630486. The cubic root of 222005666 is about 605.5100459447.

Adding to 222005666 its reverse (666500222), we get a palindrome (888505888).

The spelling of 222005666 in words is "two hundred twenty-two million, five thousand, six hundred sixty-six".