66660605841 has 8 divisors (see below), whose sum is σ = 93558745120. Its totient is φ = 42101435232.

The previous prime is 66660605839. The next prime is 66660605857. The reversal of 66660605841 is 14850606666.

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

It is not a de Polignac number, because 66660605841 - 2¹ = 66660605839 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66660605831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584742100 + ... + 584742213.

It is an arithmetic number, because the mean of its divisors is an integer number (11694843140).

Almost surely, 2^66660605841 is an apocalyptic number.

It is an amenable number.

66660605841 is a deficient number, since it is larger than the sum of its proper divisors (26898139279).

66660605841 is a wasteful number, since it uses less digits than its factorization.

66660605841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169484335.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 66660605841 in words is "sixty-six billion, six hundred sixty million, six hundred five thousand, eight hundred forty-one".