65998689956 has 12 divisors (see below), whose sum is σ = 115687987968. Its totient is φ = 32944979112.

The previous prime is 65998689947. The next prime is 65998689979.

65998689956 is nontrivially palindromic in base 10.

It is an unprimeable number.

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, 13588736 + ... + 13593591.

It is an arithmetic number, because the mean of its divisors is an integer number (9640665664).

Almost surely, 2^65998689956 is an apocalyptic number.

It is an amenable number.

65998689956 is a deficient number, since it is larger than the sum of its proper divisors (49689298012).

65998689956 is a wasteful number, since it uses less digits than its factorization.

65998689956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27182938 (or 27182936 counting only the distinct ones).

The product of its digits is 2267481600, while the sum is 80.

The spelling of 65998689956 in words is "sixty-five billion, nine hundred ninety-eight million, six hundred eighty-nine thousand, nine hundred fifty-six".