65205740 has 24 divisors (see below), whose sum is σ = 138978672. Its totient is φ = 25692480.

The previous prime is 65205719. The next prime is 65205757. The reversal of 65205740 is 4750256.

It is an unprimeable number.

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, 22991 + ... + 25670.

It is an arithmetic number, because the mean of its divisors is an integer number (5790778).

Almost surely, 2^65205740 is an apocalyptic number.

It is an amenable number.

65205740 is an abundant number, since it is smaller than the sum of its proper divisors (73772932).

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

65205740 is a wasteful number, since it uses less digits than its factorization.

65205740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48737 (or 48735 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 65205740 is about 8075.0071207399. The cubic root of 65205740 is about 402.4963465584.

Adding to 65205740 its reverse (4750256), we get a palindrome (69955996).

The spelling of 65205740 in words is "sixty-five million, two hundred five thousand, seven hundred forty".