16678971 has 12 divisors (see below), whose sum is σ = 24743472. Its totient is φ = 10818576.

The previous prime is 16678957. The next prime is 16678997. The reversal of 16678971 is 17987661.

It is not a de Polignac number, because 16678971 - 2⁵ = 16678939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16678901) 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 11 ways as a sum of consecutive naturals, for example, 24711 + ... + 25376.

It is an arithmetic number, because the mean of its divisors is an integer number (2061956).

Almost surely, 2^16678971 is an apocalyptic number.

16678971 is a deficient number, since it is larger than the sum of its proper divisors (8064501).

16678971 is a wasteful number, since it uses less digits than its factorization.

16678971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50130 (or 50127 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 16678971 is about 4083.9895935225. The cubic root of 16678971 is about 255.4993215133.

The spelling of 16678971 in words is "sixteen million, six hundred seventy-eight thousand, nine hundred seventy-one".