65775057756 has 12 divisors (see below), whose sum is σ = 153475134792. Its totient is φ = 21925019248.

The previous prime is 65775057749. The next prime is 65775057779.

It is a happy number.

65775057756 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 65775057756.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2740627395 + ... + 2740627418.

It is an arithmetic number, because the mean of its divisors is an integer number (12789594566).

Almost surely, 2^65775057756 is an apocalyptic number.

It is an amenable number.

65775057756 is an abundant number, since it is smaller than the sum of its proper divisors (87700077036).

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

65775057756 is a wasteful number, since it uses less digits than its factorization.

65775057756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481254820 (or 5481254818 counting only the distinct ones).

The product of its (nonzero) digits is 54022500, while the sum is 60.

The spelling of 65775057756 in words is "sixty-five billion, seven hundred seventy-five million, fifty-seven thousand, seven hundred fifty-six".