6682649 has 4 divisors (see below), whose sum is σ = 7075764. Its totient is φ = 6289536.

The previous prime is 6682609. The next prime is 6682693. The reversal of 6682649 is 9462866.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5929225 + 753424 = 2435^2 + 868^2 .

It is a cyclic number.

It is not a de Polignac number, because 6682649 - 2⁸ = 6682393 is a prime.

It is a d-powerful number, because it can be written as 6³ + 6⁶ + 8 + 2¹⁹ + 6⁷ + 4¹⁰ + 9⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6682609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196532 + ... + 196565.

It is an arithmetic number, because the mean of its divisors is an integer number (1768941).

Almost surely, 2^6682649 is an apocalyptic number.

It is an amenable number.

6682649 is a deficient number, since it is larger than the sum of its proper divisors (393115).

6682649 is a wasteful number, since it uses less digits than its factorization.

6682649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393114.

The product of its digits is 124416, while the sum is 41.

The square root of 6682649 is about 2585.0820103045. The cubic root of 6682649 is about 188.3574852642.

The spelling of 6682649 in words is "six million, six hundred eighty-two thousand, six hundred forty-nine".