65398718668 has 12 divisors (see below), whose sum is σ = 114938951400. Its totient is φ = 32559018272.

The previous prime is 65398718621. The next prime is 65398718677. The reversal of 65398718668 is 86681789356.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35084218 + ... + 35086081.

It is an arithmetic number, because the mean of its divisors is an integer number (9578245950).

Almost surely, 2^65398718668 is an apocalyptic number.

It is an amenable number.

65398718668 is a deficient number, since it is larger than the sum of its proper divisors (49540232732).

65398718668 is a wasteful number, since it uses less digits than its factorization.

65398718668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70170536 (or 70170534 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 67.

The spelling of 65398718668 in words is "sixty-five billion, three hundred ninety-eight million, seven hundred eighteen thousand, six hundred sixty-eight".