66343767365 has 4 divisors (see below), whose sum is σ = 79612520844. Its totient is φ = 53075013888.

The previous prime is 66343767359. The next prime is 66343767403. The reversal of 66343767365 is 56376734366.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8034074689 + 58309692676 = 89633^2 + 241474^2 .

It is a cyclic number.

It is not a de Polignac number, because 66343767365 - 2⁴ = 66343767349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66343767365.

It is a congruent number.

It is an unprimeable number.

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, 6634376732 + ... + 6634376741.

It is an arithmetic number, because the mean of its divisors is an integer number (19903130211).

Almost surely, 2^66343767365 is an apocalyptic number.

It is an amenable number.

66343767365 is a deficient number, since it is larger than the sum of its proper divisors (13268753479).

66343767365 is a wasteful number, since it uses less digits than its factorization.

66343767365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13268753478.

The product of its digits is 34292160, while the sum is 56.

The spelling of 66343767365 in words is "sixty-six billion, three hundred forty-three million, seven hundred sixty-seven thousand, three hundred sixty-five".