6681573 has 12 divisors (see below), whose sum is σ = 9815520. Its totient is φ = 4378536.

The previous prime is 6681557. The next prime is 6681581. The reversal of 6681573 is 3751866.

6681573 is a `hidden beast` number, since 6 + 6 + 81 + 573 = 666.

It is not a de Polignac number, because 6681573 - 2⁴ = 6681557 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

6681573 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6682573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5761 + ... + 6822.

It is an arithmetic number, because the mean of its divisors is an integer number (817960).

Almost surely, 2^6681573 is an apocalyptic number.

It is an amenable number.

6681573 is a deficient number, since it is larger than the sum of its proper divisors (3133947).

6681573 is a wasteful number, since it uses less digits than its factorization.

6681573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12648 (or 12645 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 6681573 is about 2584.8738847379. The cubic root of 6681573 is about 188.3473753246.

The spelling of 6681573 in words is "six million, six hundred eighty-one thousand, five hundred seventy-three".