65500064 has 72 divisors (see below), whose sum is σ = 154197540. Its totient is φ = 27288576.

The previous prime is 65500063. The next prime is 65500073. The reversal of 65500064 is 46000556.

It can be written as a sum of positive squares in 2 ways, for example, as 65480464 + 19600 = 8092^2 + 140^2 .

It is not an unprimeable number, because it can be changed into a prime (65500063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57452 + ... + 58580.

Almost surely, 2^65500064 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 65500064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77098770).

65500064 is an abundant number, since it is smaller than the sum of its proper divisors (88697476).

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

65500064 is a wasteful number, since it uses less digits than its factorization.

65500064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 1175 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 65500064 is about 8093.2109820516. The cubic root of 65500064 is about 403.1010302355.

The spelling of 65500064 in words is "sixty-five million, five hundred thousand, sixty-four".