65807616 has 72 divisors (see below), whose sum is σ = 200181184. Its totient is φ = 18800640.

The previous prime is 65807603. The next prime is 65807617. The reversal of 65807616 is 61670856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65807617) 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, 745 + ... + 11496.

Almost surely, 2^65807616 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 65807616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100090592).

65807616 is an abundant number, since it is smaller than the sum of its proper divisors (134373568).

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

65807616 is a wasteful number, since it uses less digits than its factorization.

65807616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12267 (or 12253 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 65807616 is about 8112.1893469026. The cubic root of 65807616 is about 403.7309583431.

It can be divided in two parts, 6580 and 7616, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 65807616 in words is "sixty-five million, eight hundred seven thousand, six hundred sixteen".