16680999 has 8 divisors (see below), whose sum is σ = 22606192. Its totient is φ = 10938240.

The previous prime is 16680977. The next prime is 16681001. The reversal of 16680999 is 99908661.

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

It is not a de Polignac number, because 16680999 - 2⁷ = 16680871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16680919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45394 + ... + 45759.

It is an arithmetic number, because the mean of its divisors is an integer number (2825774).

Almost surely, 2^16680999 is an apocalyptic number.

16680999 is a deficient number, since it is larger than the sum of its proper divisors (5925193).

16680999 is an equidigital number, since it uses as much as digits as its factorization.

16680999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91217.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 16680999 is about 4084.2378726024. The cubic root of 16680999 is about 255.5096765011.

The spelling of 16680999 in words is "sixteen million, six hundred eighty thousand, nine hundred ninety-nine".