65440533 has 4 divisors (see below), whose sum is σ = 87254048. Its totient is φ = 43627020.

The previous prime is 65440517. The next prime is 65440547. The reversal of 65440533 is 33504456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65440533 - 2⁴ = 65440517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65440533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65440513) 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, 10906753 + ... + 10906758.

It is an arithmetic number, because the mean of its divisors is an integer number (21813512).

Almost surely, 2^65440533 is an apocalyptic number.

It is an amenable number.

65440533 is a deficient number, since it is larger than the sum of its proper divisors (21813515).

65440533 is a wasteful number, since it uses less digits than its factorization.

65440533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21813514.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 65440533 is about 8089.5323103378. The cubic root of 65440533 is about 402.9788711633.

Adding to 65440533 its reverse (33504456), we get a palindrome (98944989).

The spelling of 65440533 in words is "sixty-five million, four hundred forty thousand, five hundred thirty-three".