6639064500 has 96 divisors (see below), whose sum is σ = 19435014144. Its totient is φ = 1761072000.

The previous prime is 6639064463. The next prime is 6639064529. The reversal of 6639064500 is 54609366.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274914 + ... + 298086.

It is an arithmetic number, because the mean of its divisors is an integer number (202448064).

Almost surely, 2^6639064500 is an apocalyptic number.

6639064500 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 6639064500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9717507072).

6639064500 is an abundant number, since it is smaller than the sum of its proper divisors (12795949644).

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

6639064500 is a wasteful number, since it uses less digits than its factorization.

6639064500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23386 (or 23374 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 6639064500 is about 81480.4547115442. The cubic root of 6639064500 is about 1879.4710013819.

The spelling of 6639064500 in words is "six billion, six hundred thirty-nine million, sixty-four thousand, five hundred".