6581966 has 4 divisors (see below), whose sum is σ = 9872952. Its totient is φ = 3290982.

The previous prime is 6581963. The next prime is 6581969. The reversal of 6581966 is 6691856.

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

It is an interprime number because it is at equal distance from previous prime (6581963) and next prime (6581969).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6581963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1645490 + ... + 1645493.

It is an arithmetic number, because the mean of its divisors is an integer number (2468238).

Almost surely, 2^6581966 is an apocalyptic number.

6581966 is a deficient number, since it is larger than the sum of its proper divisors (3290986).

6581966 is a wasteful number, since it uses less digits than its factorization.

6581966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3290985.

The product of its digits is 77760, while the sum is 41.

The square root of 6581966 is about 2565.5342523537. The cubic root of 6581966 is about 187.4067423645.

The spelling of 6581966 in words is "six million, five hundred eighty-one thousand, nine hundred sixty-six".