16680349 has 8 divisors (see below), whose sum is σ = 20184768. Its totient is φ = 13456320.

The previous prime is 16680341. The next prime is 16680371. The reversal of 16680349 is 94308661.

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

It is a cyclic number.

It is not a de Polignac number, because 16680349 - 2³ = 16680341 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 (16680341) 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, 69967 + ... + 70204.

It is an arithmetic number, because the mean of its divisors is an integer number (2523096).

Almost surely, 2^16680349 is an apocalyptic number.

It is an amenable number.

16680349 is a deficient number, since it is larger than the sum of its proper divisors (3504419).

16680349 is a wasteful number, since it uses less digits than its factorization.

16680349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140195.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 16680349 is about 4084.1582976178. The cubic root of 16680349 is about 255.5063576861.

The spelling of 16680349 in words is "sixteen million, six hundred eighty thousand, three hundred forty-nine".