66665386248 has 16 divisors (see below), whose sum is σ = 166663465680. Its totient is φ = 22221795408.

The previous prime is 66665386213. The next prime is 66665386273. The reversal of 66665386248 is 84268356666.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66665386191 and 66665386200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388862190 + ... + 1388862237.

It is an arithmetic number, because the mean of its divisors is an integer number (10416466605).

Almost surely, 2^66665386248 is an apocalyptic number.

It is an amenable number.

66665386248 is an abundant number, since it is smaller than the sum of its proper divisors (99998079432).

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

66665386248 is a wasteful number, since it uses less digits than its factorization.

66665386248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777724436 (or 2777724432 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 60.

The spelling of 66665386248 in words is "sixty-six billion, six hundred sixty-five million, three hundred eighty-six thousand, two hundred forty-eight".