65645246300664 has 128 divisors (see below), whose sum is σ = 170701341235200. Its totient is φ = 21014640967680.

The previous prime is 65645246300611. The next prime is 65645246300681. The reversal of 65645246300664 is 46600364254656.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58170247 + ... + 59288009.

It is an arithmetic number, because the mean of its divisors is an integer number (1333604228400).

Almost surely, 2^{65645246300664} 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 65645246300664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85350670617600).

65645246300664 is an abundant number, since it is smaller than the sum of its proper divisors (105056094934536).

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

65645246300664 is a wasteful number, since it uses less digits than its factorization.

65645246300664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118405 (or 1118401 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 57.

The spelling of 65645246300664 in words is "sixty-five trillion, six hundred forty-five billion, two hundred forty-six million, three hundred thousand, six hundred sixty-four".