65909745 has 48 divisors (see below), whose sum is σ = 127325952. Its totient is φ = 31265280.

The previous prime is 65909737. The next prime is 65909749. The reversal of 65909745 is 54790956.

It is a happy number.

It is not a de Polignac number, because 65909745 - 2³ = 65909737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 65909745.

It is not an unprimeable number, because it can be changed into a prime (65909749) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21849 + ... + 24681.

It is an arithmetic number, because the mean of its divisors is an integer number (2652624).

Almost surely, 2^65909745 is an apocalyptic number.

It is an amenable number.

65909745 is a deficient number, since it is larger than the sum of its proper divisors (61416207).

65909745 is a wasteful number, since it uses less digits than its factorization.

65909745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902 (or 2899 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 65909745 is about 8118.4816930261. The cubic root of 65909745 is about 403.9397048369.

The spelling of 65909745 in words is "sixty-five million, nine hundred nine thousand, seven hundred forty-five".