16680871 has 2 divisors, whose sum is σ = 16680872. Its totient is φ = 16680870.

The previous prime is 16680847. The next prime is 16680889. The reversal of 16680871 is 17808661.

16680871 is nontrivially palindromic in base 11.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16680871 - 2¹³ = 16672679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16680871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16680371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8340435 + 8340436.

It is an arithmetic number, because the mean of its divisors is an integer number (8340436).

Almost surely, 2^16680871 is an apocalyptic number.

16680871 is a deficient number, since it is larger than the sum of its proper divisors (1).

16680871 is an equidigital number, since it uses as much as digits as its factorization.

16680871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 16680871 is about 4084.2222025742. Note that the first 4 decimals coincide. The cubic root of 16680871 is about 255.5090229566.

The spelling of 16680871 in words is "sixteen million, six hundred eighty thousand, eight hundred seventy-one".