53666353 has 4 divisors (see below), whose sum is σ = 57794548. Its totient is φ = 49538160.

The previous prime is 53666351. The next prime is 53666357. The reversal of 53666353 is 35366635.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32982049 + 20684304 = 5743^2 + 4548^2 .

It is a cyclic number.

It is not a de Polignac number, because 53666353 - 2¹ = 53666351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53666351) 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, 2064078 + ... + 2064103.

It is an arithmetic number, because the mean of its divisors is an integer number (14448637).

Almost surely, 2^53666353 is an apocalyptic number.

It is an amenable number.

53666353 is a deficient number, since it is larger than the sum of its proper divisors (4128195).

53666353 is a wasteful number, since it uses less digits than its factorization.

53666353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128194.

The product of its digits is 145800, while the sum is 37.

The square root of 53666353 is about 7325.7322500894. The cubic root of 53666353 is about 377.1962452775.

The spelling of 53666353 in words is "fifty-three million, six hundred sixty-six thousand, three hundred fifty-three".