6640704000 has 960 divisors, whose sum is σ = 28812655872. Its totient is φ = 1492992000.

The previous prime is 6640703989. The next prime is 6640704013. The reversal of 6640704000 is 4070466.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 108863970 + ... + 108864030.

Almost surely, 2^6640704000 is an apocalyptic number.

6640704000 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 6640704000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14406327936).

6640704000 is an abundant number, since it is smaller than the sum of its proper divisors (22171951872).

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

6640704000 is an frugal number, since it uses more digits than its factorization.

6640704000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 6640704000 is about 81490.5147854644. The cubic root of 6640704000 is about 1879.6256988344.

Adding to 6640704000 its reverse (4070466), we get a palindrome (6644774466).

The spelling of 6640704000 in words is "six billion, six hundred forty million, seven hundred four thousand".