216594668 has 6 divisors (see below), whose sum is σ = 379040676. Its totient is φ = 108297332.

The previous prime is 216594647. The next prime is 216594673. The reversal of 216594668 is 866495612.

216594668 is nontrivially palindromic in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27074330 + ... + 27074337.

It is an arithmetic number, because the mean of its divisors is an integer number (63173446).

Almost surely, 2^216594668 is an apocalyptic number.

It is an amenable number.

216594668 is a deficient number, since it is larger than the sum of its proper divisors (162446008).

216594668 is a wasteful number, since it uses less digits than its factorization.

216594668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54148671 (or 54148669 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The square root of 216594668 is about 14717.1555675681. The cubic root of 216594668 is about 600.5501139887.

The spelling of 216594668 in words is "two hundred sixteen million, five hundred ninety-four thousand, six hundred sixty-eight".