66914381345 has 16 divisors (see below), whose sum is σ = 91779661440. Its totient is φ = 45878463744.

The previous prime is 66914381293. The next prime is 66914381383. The reversal of 66914381345 is 54318341966.

It is a cyclic number.

It is not a de Polignac number, because 66914381345 - 2²⁰ = 66913332769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66914381293 and 66914381302.

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, 178694 + ... + 407136.

It is an arithmetic number, because the mean of its divisors is an integer number (5736228840).

Almost surely, 2^66914381345 is an apocalyptic number.

It is an amenable number.

66914381345 is a deficient number, since it is larger than the sum of its proper divisors (24865280095).

66914381345 is a wasteful number, since it uses less digits than its factorization.

66914381345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236824.

The product of its digits is 1866240, while the sum is 50.

The spelling of 66914381345 in words is "sixty-six billion, nine hundred fourteen million, three hundred eighty-one thousand, three hundred forty-five".