16681671 has 12 divisors (see below), whose sum is σ = 24281400. Its totient is φ = 11035440.

The previous prime is 16681667. The next prime is 16681673. The reversal of 16681671 is 17618661.

It is not a de Polignac number, because 16681671 - 2² = 16681667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5896 + ... + 8253.

It is an arithmetic number, because the mean of its divisors is an integer number (2023450).

Almost surely, 2^16681671 is an apocalyptic number.

16681671 is a deficient number, since it is larger than the sum of its proper divisors (7599729).

16681671 is a wasteful number, since it uses less digits than its factorization.

16681671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14286 (or 14283 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 16681671 is about 4084.3201392643. The cubic root of 16681671 is about 255.5131075545.

The spelling of 16681671 in words is "sixteen million, six hundred eighty-one thousand, six hundred seventy-one".