6669216000 has 720 divisors, whose sum is σ = 25927469568. Its totient is φ = 1700352000.

The previous prime is 6669215909. The next prime is 6669216007. The reversal of 6669216000 is 6129666.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6669216007) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 80351959 + ... + 80352041.

Almost surely, 2^6669216000 is an apocalyptic number.

6669216000 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 6669216000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12963734784).

6669216000 is an abundant number, since it is smaller than the sum of its proper divisors (19258253568).

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

6669216000 is an equidigital number, since it uses as much as digits as its factorization.

6669216000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 6669216000 is about 81665.2680152340. The cubic root of 6669216000 is about 1882.3119286407.

The spelling of 6669216000 in words is "six billion, six hundred sixty-nine million, two hundred sixteen thousand".