6681653 has 4 divisors (see below), whose sum is σ = 7289088. Its totient is φ = 6074220.

The previous prime is 6681637. The next prime is 6681671. The reversal of 6681653 is 3561866.

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 6681653 - 2⁴ = 6681637 is a prime.

It is a super-4 number, since 4×6681653⁴ (a number of 28 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681683) 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 in 3 ways as a sum of consecutive naturals, for example, 303701 + ... + 303722.

It is an arithmetic number, because the mean of its divisors is an integer number (1822272).

Almost surely, 2^6681653 is an apocalyptic number.

It is an amenable number.

6681653 is a deficient number, since it is larger than the sum of its proper divisors (607435).

6681653 is a wasteful number, since it uses less digits than its factorization.

6681653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607434.

The product of its digits is 25920, while the sum is 35.

The square root of 6681653 is about 2584.8893593344. The cubic root of 6681653 is about 188.3481270303.

The spelling of 6681653 in words is "six million, six hundred eighty-one thousand, six hundred fifty-three".