65660791011 has 16 divisors (see below), whose sum is σ = 88358908416. Its totient is φ = 43368587136.

The previous prime is 65660790971. The next prime is 65660791051. The reversal of 65660791011 is 11019706656.

It is an interprime number because it is at equal distance from previous prime (65660790971) and next prime (65660791051).

It is not a de Polignac number, because 65660791011 - 2¹⁹ = 65660266723 is a prime.

It is a super-2 number, since 2×65660791011² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65660791051) 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 15 ways as a sum of consecutive naturals, for example, 809826 + ... + 887208.

It is an arithmetic number, because the mean of its divisors is an integer number (5522431776).

Almost surely, 2^65660791011 is an apocalyptic number.

65660791011 is a deficient number, since it is larger than the sum of its proper divisors (22698117405).

65660791011 is a wasteful number, since it uses less digits than its factorization.

65660791011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80002.

The product of its (nonzero) digits is 68040, while the sum is 42.

The spelling of 65660791011 in words is "sixty-five billion, six hundred sixty million, seven hundred ninety-one thousand, eleven".