16680787 has 2 divisors, whose sum is σ = 16680788. Its totient is φ = 16680786.

The previous prime is 16680767. The next prime is 16680793. The reversal of 16680787 is 78708661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16680787 - 2⁷ = 16680659 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (16680737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8340393 + 8340394.

It is an arithmetic number, because the mean of its divisors is an integer number (8340394).

Almost surely, 2^16680787 is an apocalyptic number.

16680787 is a deficient number, since it is larger than the sum of its proper divisors (1).

16680787 is an equidigital number, since it uses as much as digits as its factorization.

16680787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 16680787 is about 4084.2119190855. The cubic root of 16680787 is about 255.5085940663.

The spelling of 16680787 in words is "sixteen million, six hundred eighty thousand, seven hundred eighty-seven".