6657841 has 4 divisors (see below), whose sum is σ = 6664000. Its totient is φ = 6651684.

The previous prime is 6657811. The next prime is 6657851. The reversal of 6657841 is 1487566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6657841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6657841.

It is not an unprimeable number, because it can be changed into a prime (6657811) 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, 981 + ... + 3778.

It is an arithmetic number, because the mean of its divisors is an integer number (1666000).

Almost surely, 2^6657841 is an apocalyptic number.

It is an amenable number.

6657841 is a deficient number, since it is larger than the sum of its proper divisors (6159).

6657841 is a wasteful number, since it uses less digits than its factorization.

6657841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6158.

The product of its digits is 40320, while the sum is 37.

The square root of 6657841 is about 2580.2792484535. The cubic root of 6657841 is about 188.1241163963.

The spelling of 6657841 in words is "six million, six hundred fifty-seven thousand, eight hundred forty-one".