66224353 has 4 divisors (see below), whose sum is σ = 71318548. Its totient is φ = 61130160.

The previous prime is 66224317. The next prime is 66224369. The reversal of 66224353 is 35342266.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35342266 = 2 ⋅17671133.

It can be written as a sum of positive squares in 2 ways, for example, as 24324624 + 41899729 = 4932^2 + 6473^2 .

It is not a de Polignac number, because 66224353 - 2⁹ = 66223841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66224393) 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, 2547078 + ... + 2547103.

It is an arithmetic number, because the mean of its divisors is an integer number (17829637).

Almost surely, 2^66224353 is an apocalyptic number.

It is an amenable number.

66224353 is a deficient number, since it is larger than the sum of its proper divisors (5094195).

66224353 is a wasteful number, since it uses less digits than its factorization.

66224353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5094194.

The product of its digits is 25920, while the sum is 31.

The square root of 66224353 is about 8137.8346628572. The cubic root of 66224353 is about 404.5813954564.

The spelling of 66224353 in words is "sixty-six million, two hundred twenty-four thousand, three hundred fifty-three".