16659680 has 24 divisors (see below), whose sum is σ = 39358872. Its totient is φ = 6663808.

The previous prime is 16659673. The next prime is 16659689. The reversal of 16659680 is 8695661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16659689) 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 3 ways as a sum of consecutive naturals, for example, 51902 + ... + 52221.

It is an arithmetic number, because the mean of its divisors is an integer number (1639953).

Almost surely, 2^16659680 is an apocalyptic number.

16659680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16659680 is an abundant number, since it is smaller than the sum of its proper divisors (22699192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16659680 is a wasteful number, since it uses less digits than its factorization.

16659680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104138 (or 104130 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 16659680 is about 4081.6271265269. The cubic root of 16659680 is about 255.4007794854.

The spelling of 16659680 in words is "sixteen million, six hundred fifty-nine thousand, six hundred eighty".