6444667 has 8 divisors (see below), whose sum is σ = 6950160. Its totient is φ = 5955840.

The previous prime is 6444653. The next prime is 6444671. The reversal of 6444667 is 7664446.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6444667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6444637) 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, 3358 + ... + 4915.

It is an arithmetic number, because the mean of its divisors is an integer number (868770).

Almost surely, 2^6444667 is an apocalyptic number.

6444667 is a deficient number, since it is larger than the sum of its proper divisors (505493).

6444667 is a wasteful number, since it uses less digits than its factorization.

6444667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8333.

The product of its digits is 96768, while the sum is 37.

The square root of 6444667 is about 2538.6348693737. The cubic root of 6444667 is about 186.0944812315.

The spelling of 6444667 in words is "six million, four hundred forty-four thousand, six hundred sixty-seven".