6666000000 has 448 divisors, whose sum is σ = 24384062880. Its totient is φ = 1600000000.

The previous prime is 6665999993. The next prime is 6666000017. The reversal of 6666000000 is 6666.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

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 55 ways as a sum of consecutive naturals, for example, 65999950 + ... + 66000050.

Almost surely, 2^6666000000 is an apocalyptic number.

6666000000 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 6666000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12192031440).

6666000000 is an abundant number, since it is smaller than the sum of its proper divisors (17718062880).

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

6666000000 is an equidigital number, since it uses as much as digits as its factorization.

6666000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 6666000000 is about 81645.5755078008. The cubic root of 6666000000 is about 1882.0093199355.

Adding to 6666000000 its reverse (6666), we get a palindrome (6666006666).

Multiplying 6666000000 by its reverse (6666), we get a square (44435556000000 = 6666000²).

6666000000 divided by its reverse (6666) gives a 6-th power (1000000 = 10⁶).

It can be divided in two parts, 66 and 66000000, that multiplied together give a square (4356000000 = 66000²).

The spelling of 6666000000 in words is "six billion, six hundred sixty-six million", and thus it is an aban number.