16668338340705 has 16 divisors (see below), whose sum is σ = 26669416096320. Its totient is φ = 8889755531328.

The previous prime is 16668338340691. The next prime is 16668338340713. The reversal of 16668338340705 is 50704383386661.

It is not a de Polignac number, because 16668338340705 - 2⁸ = 16668338340449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4813386 + ... + 7517004.

It is an arithmetic number, because the mean of its divisors is an integer number (1666838506020).

Almost surely, 2^{16668338340705} is an apocalyptic number.

16668338340705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16668338340705 is a deficient number, since it is larger than the sum of its proper divisors (10001077755615).

16668338340705 is a wasteful number, since it uses less digits than its factorization.

16668338340705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114640.

The product of its (nonzero) digits is 52254720, while the sum is 60.

The spelling of 16668338340705 in words is "sixteen trillion, six hundred sixty-eight billion, three hundred thirty-eight million, three hundred forty thousand, seven hundred five".