6581641 has 8 divisors (see below), whose sum is σ = 7411968. Its totient is φ = 5790000.

The previous prime is 6581633. The next prime is 6581683. The reversal of 6581641 is 1461856.

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

It is a cyclic number.

It is not a de Polignac number, because 6581641 - 2³ = 6581633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6581621) 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 7 ways as a sum of consecutive naturals, for example, 9310 + ... + 9991.

It is an arithmetic number, because the mean of its divisors is an integer number (926496).

Almost surely, 2^6581641 is an apocalyptic number.

It is an amenable number.

6581641 is a deficient number, since it is larger than the sum of its proper divisors (830327).

6581641 is a wasteful number, since it uses less digits than its factorization.

6581641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19343.

The product of its digits is 5760, while the sum is 31.

The square root of 6581641 is about 2565.4709119380. The cubic root of 6581641 is about 187.4036577647.

The spelling of 6581641 in words is "six million, five hundred eighty-one thousand, six hundred forty-one".