65140566 has 16 divisors (see below), whose sum is σ = 137944944. Its totient is φ = 20436224.

The previous prime is 65140561. The next prime is 65140573. The reversal of 65140566 is 66504156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65140561) 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 in 7 ways as a sum of consecutive naturals, for example, 319215 + ... + 319418.

It is an arithmetic number, because the mean of its divisors is an integer number (8621559).

Almost surely, 2^65140566 is an apocalyptic number.

65140566 is an abundant number, since it is smaller than the sum of its proper divisors (72804378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65140566 is a wasteful number, since it uses less digits than its factorization.

65140566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638655.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 65140566 is about 8070.9705736051. The cubic root of 65140566 is about 402.3622017137.

The spelling of 65140566 in words is "sixty-five million, one hundred forty thousand, five hundred sixty-six".