65000644 has 6 divisors (see below), whose sum is σ = 113751134. Its totient is φ = 32500320.

The previous prime is 65000633. The next prime is 65000657. The reversal of 65000644 is 44600056.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47444544 + 17556100 = 6888^2 + 4190^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8125077 + ... + 8125084.

Almost surely, 2^65000644 is an apocalyptic number.

It is an amenable number.

65000644 is a deficient number, since it is larger than the sum of its proper divisors (48750490).

65000644 is a wasteful number, since it uses less digits than its factorization.

65000644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16250165 (or 16250163 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 65000644 is about 8062.2976873842. The cubic root of 65000644 is about 402.0739037250.

The spelling of 65000644 in words is "sixty-five million, six hundred forty-four", and thus it is an aban number.