65665412 has 6 divisors (see below), whose sum is σ = 114914478. Its totient is φ = 32832704.

The previous prime is 65665403. The next prime is 65665433. The reversal of 65665412 is 21456656.

It can be written as a sum of positive squares in only one way, i.e., 56761156 + 8904256 = 7534^2 + 2984^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8208173 + ... + 8208180.

It is an arithmetic number, because the mean of its divisors is an integer number (19152413).

Almost surely, 2^65665412 is an apocalyptic number.

It is an amenable number.

65665412 is a deficient number, since it is larger than the sum of its proper divisors (49249066).

65665412 is a wasteful number, since it uses less digits than its factorization.

65665412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16416357 (or 16416355 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 65665412 is about 8103.4197719235. The cubic root of 65665412 is about 403.4399405527.

The spelling of 65665412 in words is "sixty-five million, six hundred sixty-five thousand, four hundred twelve".