66323343601 has 4 divisors (see below), whose sum is σ = 70224716772. Its totient is φ = 62421970432.

The previous prime is 66323343587. The next prime is 66323343613. The reversal of 66323343601 is 10634332366.

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 35038224225 + 31285119376 = 187185^2 + 176876^2 .

It is a cyclic number.

It is not a de Polignac number, because 66323343601 - 2¹³ = 66323335409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66323343661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1950686560 + ... + 1950686593.

It is an arithmetic number, because the mean of its divisors is an integer number (17556179193).

Almost surely, 2^66323343601 is an apocalyptic number.

It is an amenable number.

66323343601 is a deficient number, since it is larger than the sum of its proper divisors (3901373171).

66323343601 is a wasteful number, since it uses less digits than its factorization.

66323343601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901373170.

The product of its (nonzero) digits is 139968, while the sum is 37.

Adding to 66323343601 its reverse (10634332366), we get a palindrome (76957675967).

The spelling of 66323343601 in words is "sixty-six billion, three hundred twenty-three million, three hundred forty-three thousand, six hundred one".