65020665 has 48 divisors (see below), whose sum is σ = 112995648. Its totient is φ = 31908864.

The previous prime is 65020651. The next prime is 65020691. The reversal of 65020665 is 56602056.

65020665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65020665 - 2⁴ = 65020649 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 229614 + ... + 229896.

It is an arithmetic number, because the mean of its divisors is an integer number (2354076).

Almost surely, 2^65020665 is an apocalyptic number.

It is an amenable number.

65020665 is a deficient number, since it is larger than the sum of its proper divisors (47974983).

65020665 is a wasteful number, since it uses less digits than its factorization.

65020665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 65020665 is about 8063.5392353482. The cubic root of 65020665 is about 402.1151807277.

The spelling of 65020665 in words is "sixty-five million, twenty thousand, six hundred sixty-five".