65537663 has 4 divisors (see below), whose sum is σ = 65725800. Its totient is φ = 65349528.

The previous prime is 65537657. The next prime is 65537671. The reversal of 65537663 is 36673556.

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

It is a cyclic number.

It is not a de Polignac number, because 65537663 - 2¹⁸ = 65275519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65537663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65537623) 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, 93545 + ... + 94242.

It is an arithmetic number, because the mean of its divisors is an integer number (16431450).

Almost surely, 2^65537663 is an apocalyptic number.

65537663 is a deficient number, since it is larger than the sum of its proper divisors (188137).

65537663 is a wasteful number, since it uses less digits than its factorization.

65537663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188136.

The product of its digits is 340200, while the sum is 41.

The square root of 65537663 is about 8095.5335216402. The cubic root of 65537663 is about 403.1781461730.

The spelling of 65537663 in words is "sixty-five million, five hundred thirty-seven thousand, six hundred sixty-three".