6650000000 has 288 divisors, whose sum is σ = 19921864800. Its totient is φ = 2160000000.

The previous prime is 6649999991. The next prime is 6650000003. The reversal of 6650000000 is 566.

It is a happy number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6650000003) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 349999991 + ... + 350000009.

Almost surely, 2^6650000000 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 6650000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9960932400).

6650000000 is an abundant number, since it is smaller than the sum of its proper divisors (13271864800).

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

6650000000 is an frugal number, since it uses more digits than its factorization.

6650000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 6650000000 is about 81547.5321515005. The cubic root of 6650000000 is about 1880.5023555678.

Adding to 6650000000 its reverse (566), we get a palindrome (6650000566).

The spelling of 6650000000 in words is "six billion, six hundred fifty million", and thus it is an aban number.