6599946499956 has 144 divisors (see below), whose sum is σ = 17088833938176. Its totient is φ = 2146961037312.

The previous prime is 6599946499771. The next prime is 6599946499981.

6599946499956 is a `hidden beast` number, since 6 + 5 + 9 + 9 + 9 + 464 + 9 + 99 + 56 = 666.

6599946499956 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 337704321 + ... + 337723863.

It is an arithmetic number, because the mean of its divisors is an integer number (118672457904).

Almost surely, 2^{6599946499956} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6599946499956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8544416969088).

6599946499956 is an abundant number, since it is smaller than the sum of its proper divisors (10488887438220).

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

6599946499956 is a wasteful number, since it uses less digits than its factorization.

6599946499956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20542 (or 20537 counting only the distinct ones).

The product of its digits is 45916502400, while the sum is 90.

The spelling of 6599946499956 in words is "six trillion, five hundred ninety-nine billion, nine hundred forty-six million, four hundred ninety-nine thousand, nine hundred fifty-six".