65649408 has 144 divisors (see below), whose sum is σ = 201129600. Its totient is φ = 18800640.

The previous prime is 65649407. The next prime is 65649443. The reversal of 65649408 is 80494656.

65649408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 65649408.

It is not an unprimeable number, because it can be changed into a prime (65649401) 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 15 ways as a sum of consecutive naturals, for example, 160308 + ... + 160716.

Almost surely, 2^65649408 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 65649408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100564800).

65649408 is an abundant number, since it is smaller than the sum of its proper divisors (135480192).

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

65649408 is a wasteful number, since it uses less digits than its factorization.

65649408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 65649408 is about 8102.4322274241. The cubic root of 65649408 is about 403.4071623761.

The spelling of 65649408 in words is "sixty-five million, six hundred forty-nine thousand, four hundred eight".