65116864 has 56 divisors (see below), whose sum is σ = 139281408. Its totient is φ = 30117120.

The previous prime is 65116859. The next prime is 65116867. The reversal of 65116864 is 46861156.

It is not an unprimeable number, because it can be changed into a prime (65116867) 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, 44919 + ... + 46345.

It is an arithmetic number, because the mean of its divisors is an integer number (2487168).

Almost surely, 2^65116864 is an apocalyptic number.

65116864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65116864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69640704).

65116864 is an abundant number, since it is smaller than the sum of its proper divisors (74164544).

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

65116864 is a wasteful number, since it uses less digits than its factorization.

65116864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1483 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 65116864 is about 8069.5020912074. The cubic root of 65116864 is about 402.3133947188.

The spelling of 65116864 in words is "sixty-five million, one hundred sixteen thousand, eight hundred sixty-four".