65516075720 has 32 divisors (see below), whose sum is σ = 148263273720. Its totient is φ = 26054945280.

The previous prime is 65516075701. The next prime is 65516075731. The reversal of 65516075720 is 2757061556.

It can be written as a sum of positive squares in 4 ways, for example, as 62107617796 + 3408457924 = 249214^2 + 58382^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4726901 + ... + 4740740.

Almost surely, 2^65516075720 is an apocalyptic number.

It is an amenable number.

65516075720 is an abundant number, since it is smaller than the sum of its proper divisors (82747198000).

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

65516075720 is a wasteful number, since it uses less digits than its factorization.

65516075720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9467825 (or 9467821 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 44.

The spelling of 65516075720 in words is "sixty-five billion, five hundred sixteen million, seventy-five thousand, seven hundred twenty".