6599449956 has 96 divisors (see below), whose sum is σ = 17236800000. Its totient is φ = 1948280320.

The previous prime is 6599449937. The next prime is 6599449991.

It is a happy number.

6599449956 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 876295 + ... + 883793.

It is an arithmetic number, because the mean of its divisors is an integer number (179550000).

Almost surely, 2^6599449956 is an apocalyptic number.

6599449956 is a gapful number since it is divisible by the number (66) 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 6599449956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8618400000).

6599449956 is an abundant number, since it is smaller than the sum of its proper divisors (10637350044).

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

6599449956 is a wasteful number, since it uses less digits than its factorization.

6599449956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7689 (or 7687 counting only the distinct ones).

The product of its digits is 94478400, while the sum is 66.

The square root of 6599449956 is about 81236.9986890210. The cubic root of 6599449956 is about 1875.7253448215.

The spelling of 6599449956 in words is "six billion, five hundred ninety-nine million, four hundred forty-nine thousand, nine hundred fifty-six".