6649667 has 8 divisors (see below), whose sum is σ = 6901440. Its totient is φ = 6402240.

The previous prime is 6649661. The next prime is 6649681. The reversal of 6649667 is 7669466.

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 6649667 - 2¹² = 6645571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6649661) 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, 2213 + ... + 4265.

It is an arithmetic number, because the mean of its divisors is an integer number (862680).

Almost surely, 2^6649667 is an apocalyptic number.

6649667 is a deficient number, since it is larger than the sum of its proper divisors (251773).

6649667 is a wasteful number, since it uses less digits than its factorization.

6649667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173.

The product of its digits is 326592, while the sum is 44.

The square root of 6649667 is about 2578.6948249066. The cubic root of 6649667 is about 188.0470966208.

The spelling of 6649667 in words is "six million, six hundred forty-nine thousand, six hundred sixty-seven".