320066640326560 has 48 divisors (see below), whose sum is σ = 756158843814696. Its totient is φ = 128026418070528.

The previous prime is 320066640326551. The next prime is 320066640326561. The reversal of 320066640326560 is 65623046660023.

It can be written as a sum of positive squares in 4 ways, for example, as 188570790123664 + 131495850202896 = 13732108^2 + 11467164^2 .

It is not an unprimeable number, because it can be changed into a prime (320066640326561) 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, 102804934 + ... + 105872506.

Almost surely, 2^{320066640326560} is an apocalyptic number.

It is an amenable number.

320066640326560 is an abundant number, since it is smaller than the sum of its proper divisors (436092203488136).

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

320066640326560 is a wasteful number, since it uses less digits than its factorization.

320066640326560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719705 (or 3719697 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 49.

Adding to 320066640326560 its reverse (65623046660023), we get a palindrome (385689686986583).

The spelling of 320066640326560 in words is "three hundred twenty trillion, sixty-six billion, six hundred forty million, three hundred twenty-six thousand, five hundred sixty".