6617647 has 8 divisors (see below), whose sum is σ = 6829056. Its totient is φ = 6409272.

The previous prime is 6617627. The next prime is 6617693. The reversal of 6617647 is 7467166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6617647 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 4158 + ... + 5524.

It is an arithmetic number, because the mean of its divisors is an integer number (853632).

Almost surely, 2^6617647 is an apocalyptic number.

6617647 is a deficient number, since it is larger than the sum of its proper divisors (211409).

6617647 is a wasteful number, since it uses less digits than its factorization.

6617647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517.

The product of its digits is 42336, while the sum is 37.

The square root of 6617647 is about 2572.4787657044. The cubic root of 6617647 is about 187.7447777895.

The spelling of 6617647 in words is "six million, six hundred seventeen thousand, six hundred forty-seven".