65998135 has 16 divisors (see below), whose sum is σ = 91362816. Its totient is φ = 44830368.

The previous prime is 65998133. The next prime is 65998139. The reversal of 65998135 is 53189956.

It is a cyclic number.

It is not a de Polignac number, because 65998135 - 2¹ = 65998133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65998133) 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, 5067 + ... + 12556.

It is an arithmetic number, because the mean of its divisors is an integer number (5710176).

Almost surely, 2^65998135 is an apocalyptic number.

65998135 is a deficient number, since it is larger than the sum of its proper divisors (25364681).

65998135 is a wasteful number, since it uses less digits than its factorization.

65998135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17742.

The product of its digits is 291600, while the sum is 46.

The square root of 65998135 is about 8123.9236210097. The cubic root of 65998135 is about 404.1201955048.

The spelling of 65998135 in words is "sixty-five million, nine hundred ninety-eight thousand, one hundred thirty-five".