6642846720 has 352 divisors, whose sum is σ = 24436267200. Its totient is φ = 1709309952.

The previous prime is 6642846719. The next prime is 6642846731. The reversal of 6642846720 is 276482466.

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 31 ways as a sum of consecutive naturals, for example, 4008132 + ... + 4009788.

Almost surely, 2^6642846720 is an apocalyptic number.

6642846720 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 6642846720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12218133600).

6642846720 is an abundant number, since it is smaller than the sum of its proper divisors (17793420480).

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

6642846720 is a wasteful number, since it uses less digits than its factorization.

6642846720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720 (or 1696 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The square root of 6642846720 is about 81503.6607766792. The cubic root of 6642846720 is about 1879.8278399767.

The spelling of 6642846720 in words is "six billion, six hundred forty-two million, eight hundred forty-six thousand, seven hundred twenty".