65809008 has 120 divisors (see below), whose sum is σ = 197308800. Its totient is φ = 20414592.

The previous prime is 65808991. The next prime is 65809019. The reversal of 65809008 is 80090856.

65809008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183133 + ... + 183491.

It is an arithmetic number, because the mean of its divisors is an integer number (1644240).

Almost surely, 2^65809008 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 65809008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98654400).

65809008 is an abundant number, since it is smaller than the sum of its proper divisors (131499792).

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

65809008 is a wasteful number, since it uses less digits than its factorization.

65809008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 65809008 is about 8112.2751432628. The cubic root of 65809008 is about 403.7338049717.

The spelling of 65809008 in words is "sixty-five million, eight hundred nine thousand, eight".