66159058939 has 4 divisors (see below), whose sum is σ = 66251075040. Its totient is φ = 66067042840.

The previous prime is 66159058937. The next prime is 66159058949. The reversal of 66159058939 is 93985095166.

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 66159058939 - 2¹ = 66159058937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66159058937) 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, 46006972 + ... + 46008409.

It is an arithmetic number, because the mean of its divisors is an integer number (16562768760).

Almost surely, 2^66159058939 is an apocalyptic number.

66159058939 is a deficient number, since it is larger than the sum of its proper divisors (92016101).

66159058939 is an equidigital number, since it uses as much as digits as its factorization.

66159058939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92016100.

The product of its (nonzero) digits is 15746400, while the sum is 61.

The spelling of 66159058939 in words is "sixty-six billion, one hundred fifty-nine million, fifty-eight thousand, nine hundred thirty-nine".