39659866768 has 10 divisors (see below), whose sum is σ = 76840991894. Its totient is φ = 19829933376.

The previous prime is 39659866717. The next prime is 39659866789. The reversal of 39659866768 is 86766895693.

It can be written as a sum of positive squares in only one way, i.e., 34190968464 + 5468898304 = 184908^2 + 73952^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 39659866768.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239370821 + ... + 1239370852.

Almost surely, 2^39659866768 is an apocalyptic number.

It is an amenable number.

39659866768 is a deficient number, since it is larger than the sum of its proper divisors (37181125126).

39659866768 is a wasteful number, since it uses less digits than its factorization.

39659866768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478741681 (or 2478741675 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 73.

The spelling of 39659866768 in words is "thirty-nine billion, six hundred fifty-nine million, eight hundred sixty-six thousand, seven hundred sixty-eight".