16680886 has 4 divisors (see below), whose sum is σ = 25021332. Its totient is φ = 8340442.

The previous prime is 16680871. The next prime is 16680889. The reversal of 16680886 is 68808661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16680889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4170220 + ... + 4170223.

It is an arithmetic number, because the mean of its divisors is an integer number (6255333).

Almost surely, 2^16680886 is an apocalyptic number.

16680886 is a deficient number, since it is larger than the sum of its proper divisors (8340446).

16680886 is an equidigital number, since it uses as much as digits as its factorization.

16680886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8340445.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 16680886 is about 4084.2240389087. The cubic root of 16680886 is about 255.5090995441.

The spelling of 16680886 in words is "sixteen million, six hundred eighty thousand, eight hundred eighty-six".