5998785664 has 64 divisors (see below), whose sum is σ = 12497431680. Its totient is φ = 2862745600.

The previous prime is 5998785643. The next prime is 5998785701. The reversal of 5998785664 is 4665878995.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×5998785664² = 71970858885223841792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5998785664.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531869 + ... + 1535779.

It is an arithmetic number, because the mean of its divisors is an integer number (195272370).

Almost surely, 2^5998785664 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 5998785664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6248715840).

5998785664 is an abundant number, since it is smaller than the sum of its proper divisors (6498646016).

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

5998785664 is a wasteful number, since it uses less digits than its factorization.

5998785664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4469 (or 4457 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 67.

The square root of 5998785664 is about 77451.8280223262. The cubic root of 5998785664 is about 1816.9979959525.

The spelling of 5998785664 in words is "five billion, nine hundred ninety-eight million, seven hundred eighty-five thousand, six hundred sixty-four".