65440443 has 8 divisors (see below), whose sum is σ = 90262800. Its totient is φ = 42122528.

The previous prime is 65440421. The next prime is 65440471. The reversal of 65440443 is 34404456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65440443 - 2¹⁷ = 65309371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65440443.

It is not an unprimeable number, because it can be changed into a prime (65440483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376008 + ... + 376181.

It is an arithmetic number, because the mean of its divisors is an integer number (11282850).

Almost surely, 2^65440443 is an apocalyptic number.

65440443 is a deficient number, since it is larger than the sum of its proper divisors (24822357).

65440443 is a wasteful number, since it uses less digits than its factorization.

65440443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752221.

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 65440443 is about 8089.5267475916. The cubic root of 65440443 is about 402.9786864250.

Adding to 65440443 its reverse (34404456), we get a palindrome (99844899).

The spelling of 65440443 in words is "sixty-five million, four hundred forty thousand, four hundred forty-three".