66565115345 has 16 divisors (see below), whose sum is σ = 82690882560. Its totient is φ = 51379521984.

The previous prime is 66565115329. The next prime is 66565115389. The reversal of 66565115345 is 54351156566.

It is a cyclic number.

It is not a de Polignac number, because 66565115345 - 2⁴ = 66565115329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66565115345.

It is an unprimeable number.

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, 45032 + ... + 367638.

It is an arithmetic number, because the mean of its divisors is an integer number (5168180160).

Almost surely, 2^66565115345 is an apocalyptic number.

It is an amenable number.

66565115345 is a deficient number, since it is larger than the sum of its proper divisors (16125767215).

66565115345 is a wasteful number, since it uses less digits than its factorization.

66565115345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324064.

The product of its digits is 1620000, while the sum is 47.

The spelling of 66565115345 in words is "sixty-six billion, five hundred sixty-five million, one hundred fifteen thousand, three hundred forty-five".