65440003 has 4 divisors (see below), whose sum is σ = 66040480. Its totient is φ = 64839528.

The previous prime is 65439961. The next prime is 65440031. The reversal of 65440003 is 30004456.

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

It is a cyclic number.

It is not a de Polignac number, because 65440003 - 2¹³ = 65431811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65440033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300075 + ... + 300292.

It is an arithmetic number, because the mean of its divisors is an integer number (16510120).

Almost surely, 2^65440003 is an apocalyptic number.

65440003 is a deficient number, since it is larger than the sum of its proper divisors (600477).

65440003 is a wasteful number, since it uses less digits than its factorization.

65440003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600476.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 65440003 is about 8089.4995518882. The cubic root of 65440003 is about 402.9777832576.

Adding to 65440003 its reverse (30004456), we get a palindrome (95444459).

The spelling of 65440003 in words is "sixty-five million, four hundred forty thousand, three".