66563363015 has 4 divisors (see below), whose sum is σ = 79876035624. Its totient is φ = 53250690408.

The previous prime is 66563363011. The next prime is 66563363017. The reversal of 66563363015 is 51036336566.

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

It is a cyclic number.

It is not a de Polignac number, because 66563363015 - 2² = 66563363011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66563363011) 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 3 ways as a sum of consecutive naturals, for example, 6656336297 + ... + 6656336306.

It is an arithmetic number, because the mean of its divisors is an integer number (19969008906).

Almost surely, 2^66563363015 is an apocalyptic number.

66563363015 is a deficient number, since it is larger than the sum of its proper divisors (13312672609).

66563363015 is a wasteful number, since it uses less digits than its factorization.

66563363015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13312672608.

The product of its (nonzero) digits is 874800, while the sum is 44.

The spelling of 66563363015 in words is "sixty-six billion, five hundred sixty-three million, three hundred sixty-three thousand, fifteen".