65507616 has 120 divisors (see below), whose sum is σ = 195148800. Its totient is φ = 21555072.

The previous prime is 65507609. The next prime is 65507633. The reversal of 65507616 is 61670556.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 329085 + ... + 329283.

It is an arithmetic number, because the mean of its divisors is an integer number (1626240).

Almost surely, 2^65507616 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 65507616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97574400).

65507616 is an abundant number, since it is smaller than the sum of its proper divisors (129641184).

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

65507616 is a wasteful number, since it uses less digits than its factorization.

65507616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 65507616 is about 8093.6775324941. The cubic root of 65507616 is about 403.1165218336.

The spelling of 65507616 in words is "sixty-five million, five hundred seven thousand, six hundred sixteen".