65532820 has 12 divisors (see below), whose sum is σ = 137618964. Its totient is φ = 26213120.

The previous prime is 65532811. The next prime is 65532821. The reversal of 65532820 is 2823556.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 41757444 + 23775376 = 6462^2 + 4876^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65532821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1638301 + ... + 1638340.

It is an arithmetic number, because the mean of its divisors is an integer number (11468247).

Almost surely, 2^65532820 is an apocalyptic number.

It is an amenable number.

65532820 is an abundant number, since it is smaller than the sum of its proper divisors (72086144).

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

65532820 is a wasteful number, since it uses less digits than its factorization.

65532820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276650 (or 3276648 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 65532820 is about 8095.2344005594. The cubic root of 65532820 is about 403.1682147851.

The spelling of 65532820 in words is "sixty-five million, five hundred thirty-two thousand, eight hundred twenty".