6617641 has 4 divisors (see below), whose sum is σ = 7006932. Its totient is φ = 6228352.

The previous prime is 6617627. The next prime is 6617693. The reversal of 6617641 is 1467166.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4713241 + 1904400 = 2171^2 + 1380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6617641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6615641) 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, 194620 + ... + 194653.

It is an arithmetic number, because the mean of its divisors is an integer number (1751733).

Almost surely, 2^6617641 is an apocalyptic number.

It is an amenable number.

6617641 is a deficient number, since it is larger than the sum of its proper divisors (389291).

6617641 is a wasteful number, since it uses less digits than its factorization.

6617641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389290.

The product of its digits is 6048, while the sum is 31.

The square root of 6617641 is about 2572.4775995137. The cubic root of 6617641 is about 187.7447210489.

The spelling of 6617641 in words is "six million, six hundred seventeen thousand, six hundred forty-one".