6600000000 has 360 divisors, whose sum is σ = 23976550224. Its totient is φ = 1600000000.

The previous prime is 6599999951. The next prime is 6600000067. The reversal of 6600000000 is 66.

It is a hoax number, since the sum of its digits (12) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 599999995 + ... + 600000005.

Almost surely, 2^6600000000 is an apocalyptic number.

6600000000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6600000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11988275112).

6600000000 is an abundant number, since it is smaller than the sum of its proper divisors (17376550224).

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

6600000000 is an frugal number, since it uses more digits than its factorization.

6600000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 6600000000 is about 81240.3840463596. The cubic root of 6600000000 is about 1875.7774553669. Note that the first 3 decimals are identical.

Adding to 6600000000 its reverse (66), we get a palindrome (6600000066).

Multiplying 6600000000 by its reverse (66), we get a square (435600000000 = 660000²).

6600000000 divided by its reverse (66) gives a 8-th power (100000000 = 10⁸).

It can be divided in two parts, 6 and 600000000, that multiplied together give a square (3600000000 = 60000²).

The spelling of 6600000000 in words is "six billion, six hundred million", and thus it is an aban number.