63665253 has 6 divisors (see below), whose sum is σ = 91960934. Its totient is φ = 42443496.

The previous prime is 63665191. The next prime is 63665267. The reversal of 63665253 is 35256636.

It can be written as a sum of positive squares in only one way, i.e., 56520324 + 7144929 = 7518^2 + 2673^2 .

It is not a de Polignac number, because 63665253 - 2¹⁰ = 63664229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63665453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3536950 + ... + 3536967.

Almost surely, 2^63665253 is an apocalyptic number.

It is an amenable number.

63665253 is a deficient number, since it is larger than the sum of its proper divisors (28295681).

63665253 is a wasteful number, since it uses less digits than its factorization.

63665253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7073923 (or 7073920 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

The square root of 63665253 is about 7979.0508834071. The cubic root of 63665253 is about 399.3013909906.

The spelling of 63665253 in words is "sixty-three million, six hundred sixty-five thousand, two hundred fifty-three".