662131426320 has 640 divisors, whose sum is σ = 2817349678080. Its totient is φ = 139186667520.

The previous prime is 662131426279. The next prime is 662131426343. The reversal of 662131426320 is 23624131266.

662131426320 is a `hidden beast` number, since 6 + 6 + 2 + 1 + 3 + 14 + 2 + 632 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 54441040 + ... + 54453200.

It is an arithmetic number, because the mean of its divisors is an integer number (4402108872).

Almost surely, 2^662131426320 is an apocalyptic number.

662131426320 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 662131426320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1408674839040).

662131426320 is an abundant number, since it is smaller than the sum of its proper divisors (2155218251760).

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

662131426320 is a wasteful number, since it uses less digits than its factorization.

662131426320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12480 (or 12468 counting only the distinct ones).

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

Adding to 662131426320 its reverse (23624131266), we get a palindrome (685755557586).

The spelling of 662131426320 in words is "six hundred sixty-two billion, one hundred thirty-one million, four hundred twenty-six thousand, three hundred twenty".