16678236689 has 8 divisors (see below), whose sum is σ = 17570852640. Its totient is φ = 15787102176.

The previous prime is 16678236671. The next prime is 16678236709. The reversal of 16678236689 is 98663287661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16678236689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16678230689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347204 + ... + 392309.

It is an arithmetic number, because the mean of its divisors is an integer number (2196356580).

Almost surely, 2^16678236689 is an apocalyptic number.

16678236689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16678236689 is a deficient number, since it is larger than the sum of its proper divisors (892615951).

16678236689 is a wasteful number, since it uses less digits than its factorization.

16678236689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740719.

The product of its digits is 31352832, while the sum is 62.

The spelling of 16678236689 in words is "sixteen billion, six hundred seventy-eight million, two hundred thirty-six thousand, six hundred eighty-nine".