66056243 has 4 divisors (see below), whose sum is σ = 72061368. Its totient is φ = 60051120.

The previous prime is 66056233. The next prime is 66056261. The reversal of 66056243 is 34265066.

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 66056243 - 2¹⁶ = 65990707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66056233) 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 3 ways as a sum of consecutive naturals, for example, 3002546 + ... + 3002567.

It is an arithmetic number, because the mean of its divisors is an integer number (18015342).

Almost surely, 2^66056243 is an apocalyptic number.

66056243 is a deficient number, since it is larger than the sum of its proper divisors (6005125).

66056243 is a wasteful number, since it uses less digits than its factorization.

66056243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6005124.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 66056243 is about 8127.4991848662. The cubic root of 66056243 is about 404.2387631378.

The spelling of 66056243 in words is "sixty-six million, fifty-six thousand, two hundred forty-three".