65544340 has 12 divisors (see below), whose sum is σ = 137643156. Its totient is φ = 26217728.

The previous prime is 65544313. The next prime is 65544343. The reversal of 65544340 is 4344556.

It can be written as a sum of positive squares in 2 ways, for example, as 47803396 + 17740944 = 6914^2 + 4212^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65544343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1638589 + ... + 1638628.

It is an arithmetic number, because the mean of its divisors is an integer number (11470263).

Almost surely, 2^65544340 is an apocalyptic number.

It is an amenable number.

65544340 is an abundant number, since it is smaller than the sum of its proper divisors (72098816).

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

65544340 is a wasteful number, since it uses less digits than its factorization.

65544340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277226 (or 3277224 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 65544340 is about 8095.9458990287. The cubic root of 65544340 is about 403.1918376849.

Adding to 65544340 its reverse (4344556), we get a palindrome (69888896).

The spelling of 65544340 in words is "sixty-five million, five hundred forty-four thousand, three hundred forty".