6649679000 has 64 divisors (see below), whose sum is σ = 15574515840. Its totient is φ = 2657433600.

The previous prime is 6649678993. The next prime is 6649679039. The reversal of 6649679000 is 9769466.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1420664 + ... + 1425336.

It is an arithmetic number, because the mean of its divisors is an integer number (243351810).

Almost surely, 2^6649679000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6649679000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7787257920).

6649679000 is an abundant number, since it is smaller than the sum of its proper divisors (8924836840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6649679000 is a wasteful number, since it uses less digits than its factorization.

6649679000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117 (or 6103 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 6649679000 is about 81545.5639504688. The cubic root of 6649679000 is about 1880.4720973739.

The spelling of 6649679000 in words is "six billion, six hundred forty-nine million, six hundred seventy-nine thousand".