65521516 has 12 divisors (see below), whose sum is σ = 114723280. Its totient is φ = 32743440.

The previous prime is 65521513. The next prime is 65521517. The reversal of 65521516 is 61512556.

It is not an unprimeable number, because it can be changed into a prime (65521513) 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 3 ways as a sum of consecutive naturals, for example, 8230 + ... + 14098.

Almost surely, 2^65521516 is an apocalyptic number.

It is an amenable number.

65521516 is a deficient number, since it is larger than the sum of its proper divisors (49201764).

65521516 is a wasteful number, since it uses less digits than its factorization.

65521516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8664 (or 8662 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

The square root of 65521516 is about 8094.5361818946. The cubic root of 65521516 is about 403.1450321235.

The spelling of 65521516 in words is "sixty-five million, five hundred twenty-one thousand, five hundred sixteen".