6617687 has 4 divisors (see below), whose sum is σ = 6779136. Its totient is φ = 6456240.

The previous prime is 6617627. The next prime is 6617693. The reversal of 6617687 is 7867166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7867166 = 2 ⋅3933583.

It is a cyclic number.

It is not a de Polignac number, because 6617687 - 2⁸ = 6617431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 161407 = 6617687 / (6 + 6 + 1 + 7 + 6 + 8 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6617627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80663 + ... + 80744.

It is an arithmetic number, because the mean of its divisors is an integer number (1694784).

Almost surely, 2^6617687 is an apocalyptic number.

6617687 is a deficient number, since it is larger than the sum of its proper divisors (161449).

6617687 is a wasteful number, since it uses less digits than its factorization.

6617687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161448.

The product of its digits is 84672, while the sum is 41.

The square root of 6617687 is about 2572.4865402952. The cubic root of 6617687 is about 187.7451560597.

The spelling of 6617687 in words is "six million, six hundred seventeen thousand, six hundred eighty-seven".