6446700320 has 48 divisors (see below), whose sum is σ = 15255407160. Its totient is φ = 2574434304.

The previous prime is 6446700317. The next prime is 6446700329. The reversal of 6446700320 is 230076446.

It can be written as a sum of positive squares in 4 ways, for example, as 3825669904 + 2621030416 = 61852^2 + 51196^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (6446700329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65216 + ... + 130944.

Almost surely, 2^6446700320 is an apocalyptic number.

It is an amenable number.

6446700320 is an abundant number, since it is smaller than the sum of its proper divisors (8808706840).

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

6446700320 is a wasteful number, since it uses less digits than its factorization.

6446700320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66357 (or 66349 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 6446700320 is about 80291.3464826690. The cubic root of 6446700320 is about 1861.1405037517.

Adding to 6446700320 its reverse (230076446), we get a palindrome (6676776766).

The spelling of 6446700320 in words is "six billion, four hundred forty-six million, seven hundred thousand, three hundred twenty".