39858395666 has 8 divisors (see below), whose sum is σ = 60544398720. Its totient is φ = 19676929428.

The previous prime is 39858395663. The next prime is 39858395671. The reversal of 39858395666 is 66659385893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39858395596 and 39858395605.

It is not an unprimeable number, because it can be changed into a prime (39858395663) by changing a digit.

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, 126134006 + ... + 126134321.

It is an arithmetic number, because the mean of its divisors is an integer number (7568049840).

Almost surely, 2^39858395666 is an apocalyptic number.

39858395666 is a deficient number, since it is larger than the sum of its proper divisors (20686003054).

39858395666 is a wasteful number, since it uses less digits than its factorization.

39858395666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252268408.

The product of its digits is 251942400, while the sum is 68.

The spelling of 39858395666 in words is "thirty-nine billion, eight hundred fifty-eight million, three hundred ninety-five thousand, six hundred sixty-six".