65720041001 has 4 divisors (see below), whose sum is σ = 68577434112. Its totient is φ = 62862647892.

The previous prime is 65720040949. The next prime is 65720041007. The reversal of 65720041001 is 10014002756.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-65720041001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65720041007) 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 3 ways as a sum of consecutive naturals, for example, 1428696521 + ... + 1428696566.

It is an arithmetic number, because the mean of its divisors is an integer number (17144358528).

Almost surely, 2^65720041001 is an apocalyptic number.

It is an amenable number.

65720041001 is a deficient number, since it is larger than the sum of its proper divisors (2857393111).

65720041001 is a wasteful number, since it uses less digits than its factorization.

65720041001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857393110.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 65720041001 its reverse (10014002756), we get a palindrome (75734043757).

The spelling of 65720041001 in words is "sixty-five billion, seven hundred twenty million, forty-one thousand, one".