216361665150066 has 64 divisors (see below), whose sum is σ = 482288043663360. Its totient is φ = 71898159669840.

The previous prime is 216361665150047. The next prime is 216361665150067. The reversal of 216361665150066 is 660051566163612.

216361665150066 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 6 + 1 + 66 + 515 + 0 + 0 + 66 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 216361665149994 and 216361665150021.

It is not an unprimeable number, because it can be changed into a prime (216361665150067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26862775 + ... + 33975461.

It is an arithmetic number, because the mean of its divisors is an integer number (7535750682240).

Almost surely, 2^{216361665150066} is an apocalyptic number.

216361665150066 is an abundant number, since it is smaller than the sum of its proper divisors (265926378513294).

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

216361665150066 is a wasteful number, since it uses less digits than its factorization.

216361665150066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7114436 (or 7114430 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 216361665150066 in words is "two hundred sixteen trillion, three hundred sixty-one billion, six hundred sixty-five million, one hundred fifty thousand, sixty-six".