6694649 has 8 divisors (see below), whose sum is σ = 7285320. Its totient is φ = 6114816.

The previous prime is 6694643. The next prime is 6694663. The reversal of 6694649 is 9464966.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 243049 + 6451600 = 493^2 + 2540^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6694649 - 2⁸ = 6694393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6694643) 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 7 ways as a sum of consecutive naturals, for example, 1394 + ... + 3915.

It is an arithmetic number, because the mean of its divisors is an integer number (910665).

Almost surely, 2^6694649 is an apocalyptic number.

It is an amenable number.

6694649 is a deficient number, since it is larger than the sum of its proper divisors (590671).

6694649 is a wasteful number, since it uses less digits than its factorization.

6694649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5419.

The product of its digits is 279936, while the sum is 44.

The square root of 6694649 is about 2587.4019788197. The cubic root of 6694649 is about 188.4701620505.

The spelling of 6694649 in words is "six million, six hundred ninety-four thousand, six hundred forty-nine".