65288664 has 96 divisors (see below), whose sum is σ = 203243040. Its totient is φ = 18547200.

The previous prime is 65288659. The next prime is 65288669. The reversal of 65288664 is 46688256.

It is an interprime number because it is at equal distance from previous prime (65288659) and next prime (65288669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65288669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141394 + ... + 141854.

It is an arithmetic number, because the mean of its divisors is an integer number (2117115).

Almost surely, 2^65288664 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 65288664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101621520).

65288664 is an abundant number, since it is smaller than the sum of its proper divisors (137954376).

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

65288664 is a wasteful number, since it uses less digits than its factorization.

65288664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 754 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 65288664 is about 8080.1400977953. The cubic root of 65288664 is about 402.6668963105. Note that the first 3 decimals are identical.

The spelling of 65288664 in words is "sixty-five million, two hundred eighty-eight thousand, six hundred sixty-four".