65985269 has 4 divisors (see below), whose sum is σ = 75411744. Its totient is φ = 56558796.

The previous prime is 65985259. The next prime is 65985281. The reversal of 65985269 is 96258956.

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 65985269 - 2⁴ = 65985253 is a prime.

It is a super-2 number, since 2×65985269² = 8708111450004722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65985239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4713227 + ... + 4713240.

It is an arithmetic number, because the mean of its divisors is an integer number (18852936).

Almost surely, 2^65985269 is an apocalyptic number.

It is an amenable number.

65985269 is a deficient number, since it is larger than the sum of its proper divisors (9426475).

65985269 is an equidigital number, since it uses as much as digits as its factorization.

65985269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426474.

The product of its digits is 1166400, while the sum is 50.

The square root of 65985269 is about 8123.1317236642. The cubic root of 65985269 is about 404.0939334075.

The spelling of 65985269 in words is "sixty-five million, nine hundred eighty-five thousand, two hundred sixty-nine".