16677647 has 4 divisors (see below), whose sum is σ = 19060176. Its totient is φ = 14295120.

The previous prime is 16677643. The next prime is 16677701. The reversal of 16677647 is 74677661.

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

It is not a de Polignac number, because 16677647 - 2² = 16677643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16677598 and 16677607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16677643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191254 + ... + 1191267.

It is an arithmetic number, because the mean of its divisors is an integer number (4765044).

Almost surely, 2^16677647 is an apocalyptic number.

16677647 is a deficient number, since it is larger than the sum of its proper divisors (2382529).

16677647 is an equidigital number, since it uses as much as digits as its factorization.

16677647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382528.

The product of its digits is 296352, while the sum is 44.

The square root of 16677647 is about 4083.8274939081. The cubic root of 16677647 is about 255.4925607034.

The spelling of 16677647 in words is "sixteen million, six hundred seventy-seven thousand, six hundred forty-seven".