664464575650050 has 240 divisors, whose sum is σ = 2110046515463040. Its totient is φ = 151872387575040.

The previous prime is 664464575650009. The next prime is 664464575650069. The reversal of 664464575650050 is 50056575464466.

664464575650050 is a `hidden beast` number, since 6 + 6 + 4 + 4 + 6 + 4 + 5 + 75 + 6 + 500 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 664464575650050.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 854902707 + ... + 855679593.

It is an arithmetic number, because the mean of its divisors is an integer number (8791860481096).

Almost surely, 2^{664464575650050} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664464575650050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1055023257731520).

664464575650050 is an abundant number, since it is smaller than the sum of its proper divisors (1445581939812990).

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

664464575650050 is a wasteful number, since it uses less digits than its factorization.

664464575650050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807087 (or 807073 counting only the distinct ones).

The product of its (nonzero) digits is 362880000, while the sum is 63.

The spelling of 664464575650050 in words is "six hundred sixty-four trillion, four hundred sixty-four billion, five hundred seventy-five million, six hundred fifty thousand, fifty".