65905071 has 16 divisors (see below), whose sum is σ = 90410880. Its totient is φ = 42685920.

The previous prime is 65905069. The next prime is 65905087. The reversal of 65905071 is 17050956.

It is not a de Polignac number, because 65905071 - 2¹ = 65905069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65905171) 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 15 ways as a sum of consecutive naturals, for example, 13020 + ... + 17358.

It is an arithmetic number, because the mean of its divisors is an integer number (5650680).

Almost surely, 2^65905071 is an apocalyptic number.

65905071 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

65905071 is a deficient number, since it is larger than the sum of its proper divisors (24505809).

65905071 is a wasteful number, since it uses less digits than its factorization.

65905071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486.

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 65905071 is about 8118.1938262153. The cubic root of 65905071 is about 403.9301561285.

The spelling of 65905071 in words is "sixty-five million, nine hundred five thousand, seventy-one".