65563766 has 4 divisors (see below), whose sum is σ = 98345652. Its totient is φ = 32781882.

The previous prime is 65563753. The next prime is 65563769. The reversal of 65563766 is 66736556.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65563769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16390940 + ... + 16390943.

It is an arithmetic number, because the mean of its divisors is an integer number (24586413).

Almost surely, 2^65563766 is an apocalyptic number.

65563766 is a deficient number, since it is larger than the sum of its proper divisors (32781886).

65563766 is a wasteful number, since it uses less digits than its factorization.

65563766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32781885.

The product of its digits is 680400, while the sum is 44.

The square root of 65563766 is about 8097.1455464256. The cubic root of 65563766 is about 403.2316663514.

The spelling of 65563766 in words is "sixty-five million, five hundred sixty-three thousand, seven hundred sixty-six".