66943290543 has 8 divisors (see below), whose sum is σ = 89475956400. Its totient is φ = 44519742528.

The previous prime is 66943290461. The next prime is 66943290553. The reversal of 66943290543 is 34509234966.

It is a happy number.

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

It is not a de Polignac number, because 66943290543 - 2¹² = 66943286447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66943290553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27278028 + ... + 27280481.

It is an arithmetic number, because the mean of its divisors is an integer number (11184494550).

Almost surely, 2^66943290543 is an apocalyptic number.

66943290543 is a deficient number, since it is larger than the sum of its proper divisors (22532665857).

66943290543 is a wasteful number, since it uses less digits than its factorization.

66943290543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54558921.

The product of its (nonzero) digits is 4199040, while the sum is 51.

The spelling of 66943290543 in words is "sixty-six billion, nine hundred forty-three million, two hundred ninety thousand, five hundred forty-three".