66563118112780 has 12 divisors (see below), whose sum is σ = 139782548036880. Its totient is φ = 26625247245104.

The previous prime is 66563118112741. The next prime is 66563118112781. The reversal of 66563118112780 is 8721181136566.

It is not an unprimeable number, because it can be changed into a prime (66563118112781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664077952800 + ... + 1664077952839.

It is an arithmetic number, because the mean of its divisors is an integer number (11648545669740).

Almost surely, 2^{66563118112780} is an apocalyptic number.

It is an amenable number.

66563118112780 is an abundant number, since it is smaller than the sum of its proper divisors (73219429924100).

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

66563118112780 is a wasteful number, since it uses less digits than its factorization.

66563118112780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328155905648 (or 3328155905646 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 66563118112780 in words is "sixty-six trillion, five hundred sixty-three billion, one hundred eighteen million, one hundred twelve thousand, seven hundred eighty".