66224553 has 8 divisors (see below), whose sum is σ = 90453216. Its totient is φ = 43072800.

The previous prime is 66224479. The next prime is 66224617. The reversal of 66224553 is 35542266.

66224553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66224553 - 2⁸ = 66224297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66224453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269083 + ... + 269328.

It is an arithmetic number, because the mean of its divisors is an integer number (11306652).

Almost surely, 2^66224553 is an apocalyptic number.

It is an amenable number.

66224553 is a deficient number, since it is larger than the sum of its proper divisors (24228663).

66224553 is a wasteful number, since it uses less digits than its factorization.

66224553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538455.

The product of its digits is 43200, while the sum is 33.

The square root of 66224553 is about 8137.8469511290. The cubic root of 66224553 is about 404.5818027396.

It can be divided in two parts, 6622 and 4553, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 66224553 in words is "sixty-six million, two hundred twenty-four thousand, five hundred fifty-three".