65663764 has 6 divisors (see below), whose sum is σ = 114911594. Its totient is φ = 32831880.

The previous prime is 65663749. The next prime is 65663771. The reversal of 65663764 is 46736656.

It can be written as a sum of positive squares in only one way, i.e., 48191364 + 17472400 = 6942^2 + 4180^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65663764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8207967 + ... + 8207974.

Almost surely, 2^65663764 is an apocalyptic number.

It is an amenable number.

65663764 is a deficient number, since it is larger than the sum of its proper divisors (49247830).

65663764 is a wasteful number, since it uses less digits than its factorization.

65663764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16415945 (or 16415943 counting only the distinct ones).

The product of its digits is 544320, while the sum is 43.

The square root of 65663764 is about 8103.3180858214. The cubic root of 65663764 is about 403.4365654904.

The spelling of 65663764 in words is "sixty-five million, six hundred sixty-three thousand, seven hundred sixty-four".