216616211366 has 8 divisors (see below), whose sum is σ = 324928589184. Its totient is φ = 108306681640.

The previous prime is 216616211269. The next prime is 216616211419. The reversal of 216616211366 is 663112616612.

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

It is a congruent number.

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, 510470 + ... + 832953.

It is an arithmetic number, because the mean of its divisors is an integer number (40616073648).

Almost surely, 2^216616211366 is an apocalyptic number.

216616211366 is a deficient number, since it is larger than the sum of its proper divisors (108312377818).

216616211366 is a wasteful number, since it uses less digits than its factorization.

216616211366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424046.

The product of its digits is 93312, while the sum is 41.

Adding to 216616211366 its reverse (663112616612), we get a palindrome (879728827978).

The spelling of 216616211366 in words is "two hundred sixteen billion, six hundred sixteen million, two hundred eleven thousand, three hundred sixty-six".