216669216 has 48 divisors (see below), whose sum is σ = 602217504. Its totient is φ = 67974144.

The previous prime is 216669203. The next prime is 216669221. The reversal of 216669216 is 612966612.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 64750 + ... + 68013.

It is an arithmetic number, because the mean of its divisors is an integer number (12546198).

Almost surely, 2^216669216 is an apocalyptic number.

It is an amenable number.

216669216 is an abundant number, since it is smaller than the sum of its proper divisors (385548288).

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

216669216 is a wasteful number, since it uses less digits than its factorization.

216669216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132793 (or 132785 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 216669216 is about 14719.6880401726. The cubic root of 216669216 is about 600.6190056116.

The spelling of 216669216 in words is "two hundred sixteen million, six hundred sixty-nine thousand, two hundred sixteen".