65424816 has 60 divisors (see below), whose sum is σ = 183961440. Its totient is φ = 21705600.

The previous prime is 65424781. The next prime is 65424817. The reversal of 65424816 is 61842456.

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

It is not an unprimeable number, because it can be changed into a prime (65424817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33466 + ... + 35366.

It is an arithmetic number, because the mean of its divisors is an integer number (3066024).

Almost surely, 2^65424816 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 65424816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91980720).

65424816 is an abundant number, since it is smaller than the sum of its proper divisors (118536624).

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

65424816 is a wasteful number, since it uses less digits than its factorization.

65424816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154 (or 2145 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 65424816 is about 8088.5608114176. The cubic root of 65424816 is about 402.9466071329.

The spelling of 65424816 in words is "sixty-five million, four hundred twenty-four thousand, eight hundred sixteen".