65610816 has 56 divisors (see below), whose sum is σ = 176076864. Its totient is φ = 21557760.

The previous prime is 65610761. The next prime is 65610823. The reversal of 65610816 is 61801656.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11226 + ... + 16038.

Almost surely, 2^65610816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65610816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88038432).

65610816 is an abundant number, since it is smaller than the sum of its proper divisors (110466048).

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

65610816 is a wasteful number, since it uses less digits than its factorization.

65610816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4899 (or 4889 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 65610816 is about 8100.0503702138. The cubic root of 65610816 is about 403.3280992574.

The spelling of 65610816 in words is "sixty-five million, six hundred ten thousand, eight hundred sixteen".