6643602000 has 240 divisors, whose sum is σ = 26519231232. Its totient is φ = 1518508800.

The previous prime is 6643601999. The next prime is 6643602001. The reversal of 6643602000 is 2063466.

It is an interprime number because it is at equal distance from previous prime (6643601999) and next prime (6643602001).

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6643602001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99637 + ... + 152363.

Almost surely, 2^6643602000 is an apocalyptic number.

6643602000 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 6643602000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13259615616).

6643602000 is an abundant number, since it is smaller than the sum of its proper divisors (19875629232).

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

6643602000 is a wasteful number, since it uses less digits than its factorization.

6643602000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52763 (or 52744 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 6643602000 is about 81508.2940564946. The cubic root of 6643602000 is about 1879.8990816509.

Adding to 6643602000 its reverse (2063466), we get a palindrome (6645665466).

The spelling of 6643602000 in words is "six billion, six hundred forty-three million, six hundred two thousand".