16688351668705 has 32 divisors (see below), whose sum is σ = 21102071477760. Its totient is φ = 12644752581120.

The previous prime is 16688351668691. The next prime is 16688351668739. The reversal of 16688351668705 is 50786615388661.

It is a happy number.

It is not a de Polignac number, because 16688351668705 - 2⁷ = 16688351668577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106870485 + ... + 107026525.

It is an arithmetic number, because the mean of its divisors is an integer number (659439733680).

Almost surely, 2^{16688351668705} is an apocalyptic number.

It is an amenable number.

16688351668705 is a deficient number, since it is larger than the sum of its proper divisors (4413719809055).

16688351668705 is a wasteful number, since it uses less digits than its factorization.

16688351668705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165201.

The product of its (nonzero) digits is 348364800, while the sum is 70.

The spelling of 16688351668705 in words is "sixteen trillion, six hundred eighty-eight billion, three hundred fifty-one million, six hundred sixty-eight thousand, seven hundred five".