16680705 has 8 divisors (see below), whose sum is σ = 26689152. Its totient is φ = 8896368.

The previous prime is 16680701. The next prime is 16680731. The reversal of 16680705 is 50708661.

16680705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16680705 - 2² = 16680701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16680701) 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, 556009 + ... + 556038.

It is an arithmetic number, because the mean of its divisors is an integer number (3336144).

Almost surely, 2^16680705 is an apocalyptic number.

16680705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16680705 is a deficient number, since it is larger than the sum of its proper divisors (10008447).

16680705 is a wasteful number, since it uses less digits than its factorization.

16680705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112055.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 16680705 is about 4084.2018804168. The cubic root of 16680705 is about 255.5081753862.

The spelling of 16680705 in words is "sixteen million, six hundred eighty thousand, seven hundred five".