65235664 has 80 divisors (see below), whose sum is σ = 151865280. Its totient is φ = 26818560.

The previous prime is 65235661. The next prime is 65235673. The reversal of 65235664 is 46653256.

It is a super-3 number, since 3×65235664³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65235661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66699 + ... + 67669.

It is an arithmetic number, because the mean of its divisors is an integer number (1898316).

Almost surely, 2^65235664 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 65235664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75932640).

65235664 is an abundant number, since it is smaller than the sum of its proper divisors (86629616).

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

65235664 is a wasteful number, since it uses less digits than its factorization.

65235664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 1022 counting only the distinct ones).

The product of its digits is 129600, while the sum is 37.

The square root of 65235664 is about 8076.8597858326. The cubic root of 65235664 is about 402.5579079010.

The spelling of 65235664 in words is "sixty-five million, two hundred thirty-five thousand, six hundred sixty-four".