65668622436 has 36 divisors (see below), whose sum is σ = 169127683452. Its totient is φ = 21476529984.

The previous prime is 65668622419. The next prime is 65668622443. The reversal of 65668622436 is 63422686656.

It is a happy number.

65668622436 is a `hidden beast` number, since 6 + 5 + 6 + 6 + 8 + 622 + 4 + 3 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30117519936 + 35551102500 = 173544^2 + 188550^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 17206851 + ... + 17210666.

It is an arithmetic number, because the mean of its divisors is an integer number (4697991207).

Almost surely, 2^65668622436 is an apocalyptic number.

It is an amenable number.

65668622436 is an abundant number, since it is smaller than the sum of its proper divisors (103459061016).

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

65668622436 is a wasteful number, since it uses less digits than its factorization.

65668622436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34417580 (or 34417575 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 54.

The spelling of 65668622436 in words is "sixty-five billion, six hundred sixty-eight million, six hundred twenty-two thousand, four hundred thirty-six".