65641233 has 24 divisors (see below), whose sum is σ = 107803872. Its totient is φ = 35301504.

The previous prime is 65641223. The next prime is 65641237. The reversal of 65641233 is 33214656.

65641233 = 1957² + 1958² + ... + 1973².

It is not a de Polignac number, because 65641233 - 2⁹ = 65640721 is a prime.

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 65641233.

It is not an unprimeable number, because it can be changed into a prime (65641237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10635 + ... + 15632.

It is an arithmetic number, because the mean of its divisors is an integer number (4491828).

Almost surely, 2^65641233 is an apocalyptic number.

It is an amenable number.

65641233 is a deficient number, since it is larger than the sum of its proper divisors (42162639).

65641233 is a wasteful number, since it uses less digits than its factorization.

65641233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26301 (or 26294 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 65641233 is about 8101.9277335706. The cubic root of 65641233 is about 403.3904169068.

Adding to 65641233 its reverse (33214656), we get a palindrome (98855889).

The spelling of 65641233 in words is "sixty-five million, six hundred forty-one thousand, two hundred thirty-three".