320751011800660 has 72 divisors (see below), whose sum is σ = 800220153567744. Its totient is φ = 107631950448960.

The previous prime is 320751011800651. The next prime is 320751011800669. The reversal of 320751011800660 is 66008110157023.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (320751011800651) and next prime (320751011800669).

It is a super-2 number, since 2×320751011800660² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320751011800669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3481836396 + ... + 3481928515.

It is an arithmetic number, because the mean of its divisors is an integer number (11114168799552).

Almost surely, 2^{320751011800660} is an apocalyptic number.

It is an amenable number.

320751011800660 is an abundant number, since it is smaller than the sum of its proper divisors (479469141767084).

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

320751011800660 is a wasteful number, since it uses less digits than its factorization.

320751011800660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6963764981 (or 6963764972 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

Adding to 320751011800660 its reverse (66008110157023), we get a palindrome (386759121957683).

The spelling of 320751011800660 in words is "three hundred twenty trillion, seven hundred fifty-one billion, eleven million, eight hundred thousand, six hundred sixty".