6557641 has 4 divisors (see below), whose sum is σ = 6902800. Its totient is φ = 6212484.

The previous prime is 6557623. The next prime is 6557651. The reversal of 6557641 is 1467556.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 6557641 - 2⁷ = 6557513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6557597 and 6557606.

It is not an unprimeable number, because it can be changed into a prime (6557651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172551 + ... + 172588.

It is an arithmetic number, because the mean of its divisors is an integer number (1725700).

Almost surely, 2^6557641 is an apocalyptic number.

It is an amenable number.

6557641 is a deficient number, since it is larger than the sum of its proper divisors (345159).

6557641 is a wasteful number, since it uses less digits than its factorization.

6557641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345158.

The product of its digits is 25200, while the sum is 34.

The square root of 6557641 is about 2560.7891361844. The cubic root of 6557641 is about 187.1755907401.

The spelling of 6557641 in words is "six million, five hundred fifty-seven thousand, six hundred forty-one".