65708821775 has 6 divisors (see below), whose sum is σ = 81478939032. Its totient is φ = 52567057400.

The previous prime is 65708821771. The next prime is 65708821807. The reversal of 65708821775 is 57712880756.

65708821775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65708821775 - 2² = 65708821771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65708821775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65708821771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1314176411 + ... + 1314176460.

It is an arithmetic number, because the mean of its divisors is an integer number (13579823172).

Almost surely, 2^65708821775 is an apocalyptic number.

65708821775 is a deficient number, since it is larger than the sum of its proper divisors (15770117257).

65708821775 is a wasteful number, since it uses less digits than its factorization.

65708821775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628352881 (or 2628352876 counting only the distinct ones).

The product of its (nonzero) digits is 6585600, while the sum is 56.

The spelling of 65708821775 in words is "sixty-five billion, seven hundred eight million, eight hundred twenty-one thousand, seven hundred seventy-five".