66442341563 has 8 divisors (see below), whose sum is σ = 71570553600. Its totient is φ = 61316595648.

The previous prime is 66442341551. The next prime is 66442341577. The reversal of 66442341563 is 36514324466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66442341563 - 2¹⁸ = 66442079419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66442341503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560378 + ... + 668511.

It is an arithmetic number, because the mean of its divisors is an integer number (8946319200).

Almost surely, 2^66442341563 is an apocalyptic number.

66442341563 is a deficient number, since it is larger than the sum of its proper divisors (5128212037).

66442341563 is a wasteful number, since it uses less digits than its factorization.

66442341563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233061.

The product of its digits is 1244160, while the sum is 44.

The spelling of 66442341563 in words is "sixty-six billion, four hundred forty-two million, three hundred forty-one thousand, five hundred sixty-three".