65111808 has 72 divisors (see below), whose sum is σ = 174762000. Its totient is φ = 21520384.

The previous prime is 65111807. The next prime is 65111833. The reversal of 65111808 is 80811156.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65111807) 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, 114148 + ... + 114716.

It is an arithmetic number, because the mean of its divisors is an integer number (2427250).

Almost surely, 2^65111808 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 65111808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87381000).

65111808 is an abundant number, since it is smaller than the sum of its proper divisors (109650192).

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

65111808 is a wasteful number, since it uses less digits than its factorization.

65111808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 65111808 is about 8069.1888068132. The cubic root of 65111808 is about 402.3029819059.

The spelling of 65111808 in words is "sixty-five million, one hundred eleven thousand, eight hundred eight".