66863394367 has 16 divisors (see below), whose sum is σ = 83461593600. Its totient is φ = 52039196640.

The previous prime is 66863394347. The next prime is 66863394373. The reversal of 66863394367 is 76349336866.

It is a cyclic number.

It is not a de Polignac number, because 66863394367 - 2³¹ = 64715910719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66863394347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452892 + ... + 582097.

It is an arithmetic number, because the mean of its divisors is an integer number (5216349600).

Almost surely, 2^66863394367 is an apocalyptic number.

66863394367 is a deficient number, since it is larger than the sum of its proper divisors (16598199233).

66863394367 is a wasteful number, since it uses less digits than its factorization.

66863394367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035846.

The product of its digits is 70543872, while the sum is 61.

The spelling of 66863394367 in words is "sixty-six billion, eight hundred sixty-three million, three hundred ninety-four thousand, three hundred sixty-seven".