65516700520 has 32 divisors (see below), whose sum is σ = 156083905800. Its totient is φ = 24665110528.

The previous prime is 65516700511. The next prime is 65516700521. The reversal of 65516700520 is 2500761556.

It can be written as a sum of positive squares in 4 ways, for example, as 59176400644 + 6340299876 = 243262^2 + 79626^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65516700520.

It is not an unprimeable number, because it can be changed into a prime (65516700521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48173365 + ... + 48174724.

Almost surely, 2^65516700520 is an apocalyptic number.

It is an amenable number.

65516700520 is an abundant number, since it is smaller than the sum of its proper divisors (90567205280).

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

65516700520 is a wasteful number, since it uses less digits than its factorization.

65516700520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96348117 (or 96348113 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 65516700520 in words is "sixty-five billion, five hundred sixteen million, seven hundred thousand, five hundred twenty".