65665331 has 2 divisors, whose sum is σ = 65665332. Its totient is φ = 65665330.

The previous prime is 65665319. The next prime is 65665351. The reversal of 65665331 is 13356656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65665331 - 2⁶ = 65665267 is a prime.

It is a super-2 number, since 2×65665331² = 8623871390679122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 65665291 and 65665300.

It is not a weakly prime, because it can be changed into another prime (65665351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32832665 + 32832666.

It is an arithmetic number, because the mean of its divisors is an integer number (32832666).

Almost surely, 2^65665331 is an apocalyptic number.

65665331 is a deficient number, since it is larger than the sum of its proper divisors (1).

65665331 is an equidigital number, since it uses as much as digits as its factorization.

65665331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 35.

The square root of 65665331 is about 8103.4147740320. The cubic root of 65665331 is about 403.4397746681.

The spelling of 65665331 in words is "sixty-five million, six hundred sixty-five thousand, three hundred thirty-one".