65338000721 has 8 divisors (see below), whose sum is σ = 74687553984. Its totient is φ = 55992335760.

The previous prime is 65338000667. The next prime is 65338000723. The reversal of 65338000721 is 12700083356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65338000721 - 2¹⁸ = 65337738577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65338000723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935975 + ... + 1003356.

It is an arithmetic number, because the mean of its divisors is an integer number (9335944248).

Almost surely, 2^65338000721 is an apocalyptic number.

It is an amenable number.

65338000721 is a deficient number, since it is larger than the sum of its proper divisors (9349553263).

65338000721 is a wasteful number, since it uses less digits than its factorization.

65338000721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944151.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 65338000721 in words is "sixty-five billion, three hundred thirty-eight million, seven hundred twenty-one", and thus it is an aban number.