65985368646 has 32 divisors (see below), whose sum is σ = 132362730720. Its totient is φ = 21929889024.

The previous prime is 65985368639. The next prime is 65985368663. The reversal of 65985368646 is 64686358956.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 2831490 + ... + 2854698.

It is an arithmetic number, because the mean of its divisors is an integer number (4136335335).

Almost surely, 2^65985368646 is an apocalyptic number.

65985368646 is an abundant number, since it is smaller than the sum of its proper divisors (66377362074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65985368646 is a wasteful number, since it uses less digits than its factorization.

65985368646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24600.

The product of its digits is 223948800, while the sum is 66.

The spelling of 65985368646 in words is "sixty-five billion, nine hundred eighty-five million, three hundred sixty-eight thousand, six hundred forty-six".