65516500 has 48 divisors (see below), whose sum is σ = 163537920. Its totient is φ = 22461600.

The previous prime is 65516471. The next prime is 65516509. The reversal of 65516500 is 561556.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65516509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5860 + ... + 12859.

It is an arithmetic number, because the mean of its divisors is an integer number (3407040).

Almost surely, 2^65516500 is an apocalyptic number.

It is an amenable number.

65516500 is an abundant number, since it is smaller than the sum of its proper divisors (98021420).

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

65516500 is a wasteful number, since it uses less digits than its factorization.

65516500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18745 (or 18733 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 65516500 is about 8094.2263373345. The cubic root of 65516500 is about 403.1347442710.

The spelling of 65516500 in words is "sixty-five million, five hundred sixteen thousand, five hundred".