6321602664 has 128 divisors (see below), whose sum is σ = 19017936000. Its totient is φ = 1934088192.

The previous prime is 6321602663. The next prime is 6321602669. The reversal of 6321602664 is 4662061236.

6321602664 is a `hidden beast` number, since 632 + 16 + 0 + 2 + 6 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6321602663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 496344 + ... + 508920.

It is an arithmetic number, because the mean of its divisors is an integer number (148577625).

Almost surely, 2^6321602664 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 6321602664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9508968000).

6321602664 is an abundant number, since it is smaller than the sum of its proper divisors (12696333336).

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

6321602664 is a wasteful number, since it uses less digits than its factorization.

6321602664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12784 (or 12774 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 6321602664 is about 79508.5068656178. The cubic root of 6321602664 is about 1849.0233621838.

The spelling of 6321602664 in words is "six billion, three hundred twenty-one million, six hundred two thousand, six hundred sixty-four".