65840535 has 12 divisors (see below), whose sum is σ = 114123672. Its totient is φ = 35114928.

The previous prime is 65840531. The next prime is 65840539. The reversal of 65840535 is 53504856.

It is an interprime number because it is at equal distance from previous prime (65840531) and next prime (65840539).

It is not a de Polignac number, because 65840535 - 2² = 65840531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65840535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65840531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 731517 + ... + 731606.

It is an arithmetic number, because the mean of its divisors is an integer number (9510306).

Almost surely, 2^65840535 is an apocalyptic number.

65840535 is a deficient number, since it is larger than the sum of its proper divisors (48283137).

65840535 is a wasteful number, since it uses less digits than its factorization.

65840535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463134 (or 1463131 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 65840535 is about 8114.2180769314. The cubic root of 65840535 is about 403.7982666819.

The spelling of 65840535 in words is "sixty-five million, eight hundred forty thousand, five hundred thirty-five".