6578661 has 4 divisors (see below), whose sum is σ = 8771552. Its totient is φ = 4385772.

The previous prime is 6578659. The next prime is 6578669. The reversal of 6578661 is 1668756.

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 not a de Polignac number, because 6578661 - 2¹ = 6578659 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6578669) 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, 1096441 + ... + 1096446.

It is an arithmetic number, because the mean of its divisors is an integer number (2192888).

Almost surely, 2^6578661 is an apocalyptic number.

It is an amenable number.

6578661 is a deficient number, since it is larger than the sum of its proper divisors (2192891).

6578661 is a wasteful number, since it uses less digits than its factorization.

6578661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192890.

The product of its digits is 60480, while the sum is 39.

The square root of 6578661 is about 2564.8900561233. The cubic root of 6578661 is about 187.3753696216.

The spelling of 6578661 in words is "six million, five hundred seventy-eight thousand, six hundred sixty-one".