65885669 has 2 divisors, whose sum is σ = 65885670.
Its totient is φ = 65885668.
The previous prime is 65885627. The next prime is 65885707. The reversal of 65885669 is 96658856.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 65772100 + 113569 = 8110^2 + 337^2
It is a cyclic number.
It is not a de Polignac number, because 65885669 - 224 = 49108453 is a prime.
It is a super-2 number, since 2×658856692 = 8681842759155122, which contains 22 as substring.
It is a Chen prime.
It is a self number, because there is not a number n which added to its sum of digits gives 65885669.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (65885269) 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, 32942834 + 32942835.
It is an arithmetic number, because the mean of its divisors is an integer number (32942835).
Almost surely, 265885669 is an apocalyptic number.
It is an amenable number.
65885669 is a deficient number, since it is larger than the sum of its proper divisors (1).
65885669 is an equidigital number, since it uses as much as digits as its factorization.
65885669 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 3110400, while the sum is 53.
The square root of 65885669 is about 8116.9987680176.
The cubic root of 65885669 is about 403.8905141507.
The spelling of 65885669 in words is "sixty-five million, eight hundred eighty-five thousand, six hundred sixty-nine".