6599024640 has 784 divisors, whose sum is σ = 27074807928. Its totient is φ = 1528823808.

The previous prime is 6599024573. The next prime is 6599024651. The reversal of 6599024640 is 464209956.

It can be written as a sum of positive squares in 4 ways, for example, as 5019439104 + 1579585536 = 70848^2 + 39744^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 388177912 + ... + 388177928.

Almost surely, 2^6599024640 is an apocalyptic number.

6599024640 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 6599024640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13537403964).

6599024640 is an abundant number, since it is smaller than the sum of its proper divisors (20475783288).

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

6599024640 is an equidigital number, since it uses as much as digits as its factorization.

6599024640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 6599024640 is about 81234.3808987303. The cubic root of 6599024640 is about 1875.6850488805.

The spelling of 6599024640 in words is "six billion, five hundred ninety-nine million, twenty-four thousand, six hundred forty".