65143663 has 4 divisors (see below), whose sum is σ = 70154728. Its totient is φ = 60132600.

The previous prime is 65143621. The next prime is 65143681. The reversal of 65143663 is 36634156.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65143663 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 (65143693) 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, 2505513 + ... + 2505538.

It is an arithmetic number, because the mean of its divisors is an integer number (17538682).

Almost surely, 2^65143663 is an apocalyptic number.

65143663 is a deficient number, since it is larger than the sum of its proper divisors (5011065).

65143663 is a wasteful number, since it uses less digits than its factorization.

65143663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011064.

The product of its digits is 38880, while the sum is 34.

The square root of 65143663 is about 8071.1624317690. The cubic root of 65143663 is about 402.3685781602.

The spelling of 65143663 in words is "sixty-five million, one hundred forty-three thousand, six hundred sixty-three".