8216660536780 has 48 divisors (see below), whose sum is σ = 17410238060544. Its totient is φ = 3257101137920.

The previous prime is 8216660536741. The next prime is 8216660536781. The reversal of 8216660536780 is 876350666128.

It is not an unprimeable number, because it can be changed into a prime (8216660536781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15355824 + ... + 15881896.

It is an arithmetic number, because the mean of its divisors is an integer number (362713292928).

Almost surely, 2^{8216660536780} is an apocalyptic number.

It is an amenable number.

8216660536780 is an abundant number, since it is smaller than the sum of its proper divisors (9193577523764).

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

8216660536780 is a wasteful number, since it uses less digits than its factorization.

8216660536780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533106 (or 533104 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 8216660536780 in words is "eight trillion, two hundred sixteen billion, six hundred sixty million, five hundred thirty-six thousand, seven hundred eighty".