65517663 has 16 divisors (see below), whose sum is σ = 90438656. Its totient is φ = 42145920.

The previous prime is 65517653. The next prime is 65517667. The reversal of 65517663 is 36671556.

It is a de Polignac number, because none of the positive numbers 2^k-65517663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65517667) 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, 39456 + ... + 41082.

It is an arithmetic number, because the mean of its divisors is an integer number (5652416).

Almost surely, 2^65517663 is an apocalyptic number.

65517663 is a deficient number, since it is larger than the sum of its proper divisors (24920993).

65517663 is a wasteful number, since it uses less digits than its factorization.

65517663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094.

The product of its digits is 113400, while the sum is 39.

The square root of 65517663 is about 8094.2981783475. The cubic root of 65517663 is about 403.1371296392.

The spelling of 65517663 in words is "sixty-five million, five hundred seventeen thousand, six hundred sixty-three".