66598218384 has 20 divisors (see below), whose sum is σ = 172045397616. Its totient is φ = 22199406112.

The previous prime is 66598218371. The next prime is 66598218433. The reversal of 66598218384 is 48381289566.

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, 693731394 + ... + 693731489.

Almost surely, 2^66598218384 is an apocalyptic number.

It is an amenable number.

66598218384 is an abundant number, since it is smaller than the sum of its proper divisors (105447179232).

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

66598218384 is a wasteful number, since it uses less digits than its factorization.

66598218384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387462894 (or 1387462888 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 60.

The spelling of 66598218384 in words is "sixty-six billion, five hundred ninety-eight million, two hundred eighteen thousand, three hundred eighty-four".