66542273159 has 4 divisors (see below), whose sum is σ = 66544464216. Its totient is φ = 66540082104.

The previous prime is 66542273129. The next prime is 66542273179. The reversal of 66542273159 is 95137224566.

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 66542273159 - 2¹² = 66542269063 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 (66542273129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049324 + ... + 1110929.

It is an arithmetic number, because the mean of its divisors is an integer number (16636116054).

Almost surely, 2^66542273159 is an apocalyptic number.

66542273159 is a deficient number, since it is larger than the sum of its proper divisors (2191057).

66542273159 is a wasteful number, since it uses less digits than its factorization.

66542273159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191056.

The product of its digits is 2721600, while the sum is 50.

The spelling of 66542273159 in words is "sixty-six billion, five hundred forty-two million, two hundred seventy-three thousand, one hundred fifty-nine".