65645934 has 32 divisors (see below), whose sum is σ = 135184896. Its totient is φ = 21240960.

The previous prime is 65645929. The next prime is 65645977. The reversal of 65645934 is 43954656.

It is a congruent number.

It is an unprimeable number.

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, 36054 + ... + 37830.

It is an arithmetic number, because the mean of its divisors is an integer number (4224528).

Almost surely, 2^65645934 is an apocalyptic number.

65645934 is an abundant number, since it is smaller than the sum of its proper divisors (69538962).

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

65645934 is a wasteful number, since it uses less digits than its factorization.

65645934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960.

The product of its digits is 388800, while the sum is 42.

The square root of 65645934 is about 8102.2178445164. The cubic root of 65645934 is about 403.4000464896.

The spelling of 65645934 in words is "sixty-five million, six hundred forty-five thousand, nine hundred thirty-four".