6640574421312 has 168 divisors, whose sum is σ = 20499764070240. Its totient is φ = 2043093980160.

The previous prime is 6640574421301. The next prime is 6640574421329. The reversal of 6640574421312 is 2131244750466.

6640574421312 is a `hidden beast` number, since 6 + 6 + 4 + 0 + 574 + 42 + 1 + 31 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126753139 + ... + 126805517.

It is an arithmetic number, because the mean of its divisors is an integer number (122022405180).

Almost surely, 2^{6640574421312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6640574421312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10249882035120).

6640574421312 is an abundant number, since it is smaller than the sum of its proper divisors (13859189648928).

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

6640574421312 is a wasteful number, since it uses less digits than its factorization.

6640574421312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69341 (or 69328 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 6640574421312 in words is "six trillion, six hundred forty billion, five hundred seventy-four million, four hundred twenty-one thousand, three hundred twelve".