216330320668 has 48 divisors (see below), whose sum is σ = 492514896384. Its totient is φ = 80619992640.

The previous prime is 216330320653. The next prime is 216330320681. The reversal of 216330320668 is 866023033612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 216330320668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15261855 + ... + 15276022.

It is an arithmetic number, because the mean of its divisors is an integer number (10260727008).

Almost surely, 2^216330320668 is an apocalyptic number.

216330320668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216330320668 is an abundant number, since it is smaller than the sum of its proper divisors (276184575716).

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

216330320668 is a wasteful number, since it uses less digits than its factorization.

216330320668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30537922 (or 30537920 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 216330320668 in words is "two hundred sixteen billion, three hundred thirty million, three hundred twenty thousand, six hundred sixty-eight".