66530268443 has 4 divisors (see below), whose sum is σ = 66864591600. Its totient is φ = 66195945288.

The previous prime is 66530268403. The next prime is 66530268457. The reversal of 66530268443 is 34486203566.

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 66530268443 - 2⁶ = 66530268379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66530268403) 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, 167161280 + ... + 167161677.

It is an arithmetic number, because the mean of its divisors is an integer number (16716147900).

Almost surely, 2^66530268443 is an apocalyptic number.

66530268443 is a deficient number, since it is larger than the sum of its proper divisors (334323157).

66530268443 is a wasteful number, since it uses less digits than its factorization.

66530268443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334323156.

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 66530268443 in words is "sixty-six billion, five hundred thirty million, two hundred sixty-eight thousand, four hundred forty-three".