65243663 has 16 divisors (see below), whose sum is σ = 72161280. Its totient is φ = 58712544.

The previous prime is 65243653. The next prime is 65243683. The reversal of 65243663 is 36634256.

It is a cyclic number.

It is not a de Polignac number, because 65243663 - 2⁸ = 65243407 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 (65243653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75170 + ... + 76032.

It is an arithmetic number, because the mean of its divisors is an integer number (4510080).

Almost surely, 2^65243663 is an apocalyptic number.

65243663 is a deficient number, since it is larger than the sum of its proper divisors (6917617).

65243663 is a wasteful number, since it uses less digits than its factorization.

65243663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078.

The product of its digits is 77760, while the sum is 35.

The square root of 65243663 is about 8077.3549507249. The cubic root of 65243663 is about 402.5743607067.

The spelling of 65243663 in words is "sixty-five million, two hundred forty-three thousand, six hundred sixty-three".