65615916 has 12 divisors (see below), whose sum is σ = 153103832. Its totient is φ = 21871968.

The previous prime is 65615909. The next prime is 65615917. The reversal of 65615916 is 61951656.

65615916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (65615917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2733985 + ... + 2734008.

Almost surely, 2^65615916 is an apocalyptic number.

It is an amenable number.

65615916 is an abundant number, since it is smaller than the sum of its proper divisors (87487916).

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

65615916 is a wasteful number, since it uses less digits than its factorization.

65615916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5468000 (or 5467998 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 65615916 is about 8100.3651769534. The cubic root of 65615916 is about 403.3385493637.

The spelling of 65615916 in words is "sixty-five million, six hundred fifteen thousand, nine hundred sixteen".