6640363536065 has 64 divisors (see below), whose sum is σ = 9326289369600. Its totient is φ = 4536928972800.

The previous prime is 6640363536061. The next prime is 6640363536071. The reversal of 6640363536065 is 5606353630466.

It is not a de Polignac number, because 6640363536065 - 2² = 6640363536061 is a prime.

It is a super-3 number, since 3×6640363536065³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 6640363535998 and 6640363536016.

It is not an unprimeable number, because it can be changed into a prime (6640363536061) 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 63 ways as a sum of consecutive naturals, for example, 671892614 + ... + 671902496.

It is an arithmetic number, because the mean of its divisors is an integer number (145723271400).

Almost surely, 2^{6640363536065} is an apocalyptic number.

It is an amenable number.

6640363536065 is a deficient number, since it is larger than the sum of its proper divisors (2685925833535).

6640363536065 is an equidigital number, since it uses as much as digits as its factorization.

6640363536065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11287 (or 11273 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 53.

The spelling of 6640363536065 in words is "six trillion, six hundred forty billion, three hundred sixty-three million, five hundred thirty-six thousand, sixty-five".