65340204021 has 24 divisors (see below), whose sum is σ = 99995575680. Its totient is φ = 40971724416.

The previous prime is 65340204011. The next prime is 65340204053. The reversal of 65340204021 is 12040204356.

65340204021 is a `hidden beast` number, since 653 + 4 + 0 + 2 + 0 + 4 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 65340204021 - 2⁷ = 65340203893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65340204011) 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, 107310 + ... + 377088.

It is an arithmetic number, because the mean of its divisors is an integer number (4166482320).

Almost surely, 2^65340204021 is an apocalyptic number.

It is an amenable number.

65340204021 is a deficient number, since it is larger than the sum of its proper divisors (34655371659).

65340204021 is a wasteful number, since it uses less digits than its factorization.

65340204021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271385 (or 271382 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 65340204021 its reverse (12040204356), we get a palindrome (77380408377).

It can be divided in two parts, 65340 and 204021, that added together give a square (269361 = 519²).

The spelling of 65340204021 in words is "sixty-five billion, three hundred forty million, two hundred four thousand, twenty-one".