65881233 has 18 divisors (see below), whose sum is σ = 104601042. Its totient is φ = 39927360.

The previous prime is 65881217. The next prime is 65881253. The reversal of 65881233 is 33218856.

65881233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 64834704 + 1046529 = 8052^2 + 1023^2 .

It is not a de Polignac number, because 65881233 - 2⁴ = 65881217 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65881213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 29160 + ... + 31337.

It is an arithmetic number, because the mean of its divisors is an integer number (5811169).

Almost surely, 2^65881233 is an apocalyptic number.

It is an amenable number.

65881233 is a deficient number, since it is larger than the sum of its proper divisors (38719809).

65881233 is a wasteful number, since it uses less digits than its factorization.

65881233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60525 (or 60511 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 65881233 is about 8116.7255097114. The cubic root of 65881233 is about 403.8814494656.

The spelling of 65881233 in words is "sixty-five million, eight hundred eighty-one thousand, two hundred thirty-three".