6768649 has 4 divisors (see below), whose sum is σ = 6933780. Its totient is φ = 6603520.

The previous prime is 6768637. The next prime is 6768653. The reversal of 6768649 is 9468676.

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 230400 + 6538249 = 480^2 + 2557^2 .

It is a cyclic number.

It is not a de Polignac number, because 6768649 - 2¹¹ = 6766601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6768599 and 6768608.

It is not an unprimeable number, because it can be changed into a prime (6768659) 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, 82504 + ... + 82585.

It is an arithmetic number, because the mean of its divisors is an integer number (1733445).

Almost surely, 2^6768649 is an apocalyptic number.

It is an amenable number.

6768649 is a deficient number, since it is larger than the sum of its proper divisors (165131).

6768649 is a wasteful number, since it uses less digits than its factorization.

6768649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165130.

The product of its digits is 435456, while the sum is 46.

The square root of 6768649 is about 2601.6627375584. The cubic root of 6768649 is about 189.1620438709.

It can be divided in two parts, 676 and 8649, that multiplied together give a square (5846724 = 2418²).

The spelling of 6768649 in words is "six million, seven hundred sixty-eight thousand, six hundred forty-nine".