6639449367 has 8 divisors (see below), whose sum is σ = 8852976000. Its totient is φ = 4426111160.

The previous prime is 6639449359. The next prime is 6639449371. The reversal of 6639449367 is 7639449366.

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 6639449367 - 2³ = 6639449359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639449317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109384 + ... + 158882.

It is an arithmetic number, because the mean of its divisors is an integer number (1106622000).

Almost surely, 2^6639449367 is an apocalyptic number.

6639449367 is a deficient number, since it is larger than the sum of its proper divisors (2213526633).

6639449367 is a wasteful number, since it uses less digits than its factorization.

6639449367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94213.

The product of its digits is 17635968, while the sum is 57.

The square root of 6639449367 is about 81482.8163909422. The cubic root of 6639449367 is about 1879.5073183655.

Subtracting 6639449367 from its reverse (7639449366), we obtain a palindrome (999999999).

The spelling of 6639449367 in words is "six billion, six hundred thirty-nine million, four hundred forty-nine thousand, three hundred sixty-seven".