66224073 has 8 divisors (see below), whose sum is σ = 89616928. Its totient is φ = 43490304.

The previous prime is 66224071. The next prime is 66224077. The reversal of 66224073 is 37042266.

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

It is not a de Polignac number, because 66224073 - 2¹ = 66224071 is a prime.

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 66224073.

It is not an unprimeable number, because it can be changed into a prime (66224071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164536 + ... + 164937.

It is an arithmetic number, because the mean of its divisors is an integer number (11202116).

Almost surely, 2^66224073 is an apocalyptic number.

It is an amenable number.

66224073 is a deficient number, since it is larger than the sum of its proper divisors (23392855).

66224073 is a wasteful number, since it uses less digits than its factorization.

66224073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329543.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 66224073 is about 8137.8174592454. The cubic root of 66224073 is about 404.5808252585.

The spelling of 66224073 in words is "sixty-six million, two hundred twenty-four thousand, seventy-three".