66043648147 has 4 divisors (see below), whose sum is σ = 66044169936. Its totient is φ = 66043126360.

The previous prime is 66043648123. The next prime is 66043648169. The reversal of 66043648147 is 74184634066.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66043648147 - 2¹¹ = 66043646099 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66043648147.

It is not an unprimeable number, because it can be changed into a prime (66043648247) 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, 62997 + ... + 368857.

It is an arithmetic number, because the mean of its divisors is an integer number (16511042484).

Almost surely, 2^66043648147 is an apocalyptic number.

66043648147 is a deficient number, since it is larger than the sum of its proper divisors (521789).

66043648147 is a wasteful number, since it uses less digits than its factorization.

66043648147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521788.

The product of its (nonzero) digits is 2322432, while the sum is 49.

The spelling of 66043648147 in words is "sixty-six billion, forty-three million, six hundred forty-eight thousand, one hundred forty-seven".