65986434 has 16 divisors (see below), whose sum is σ = 146636640. Its totient is φ = 21995460.

The previous prime is 65986433. The next prime is 65986441. The reversal of 65986434 is 43468956.

It is a self number, because there is not a number n which added to its sum of digits gives 65986434.

It is not an unprimeable number, because it can be changed into a prime (65986433) 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 7 ways as a sum of consecutive naturals, for example, 610932 + ... + 611039.

It is an arithmetic number, because the mean of its divisors is an integer number (9164790).

Almost surely, 2^65986434 is an apocalyptic number.

65986434 is an abundant number, since it is smaller than the sum of its proper divisors (80650206).

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

65986434 is a wasteful number, since it uses less digits than its factorization.

65986434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221982 (or 1221976 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 65986434 is about 8123.2034321442. The cubic root of 65986434 is about 404.0963115477.

The spelling of 65986434 in words is "sixty-five million, nine hundred eighty-six thousand, four hundred thirty-four".