65985904 has 20 divisors (see below), whose sum is σ = 132257160. Its totient is φ = 31855040.

The previous prime is 65985893. The next prime is 65985929. The reversal of 65985904 is 40958956.

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 3 ways as a sum of consecutive naturals, for example, 70642 + ... + 71569.

It is an arithmetic number, because the mean of its divisors is an integer number (6612858).

Almost surely, 2^65985904 is an apocalyptic number.

It is an amenable number.

65985904 is an abundant number, since it is smaller than the sum of its proper divisors (66271256).

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

65985904 is a wasteful number, since it uses less digits than its factorization.

65985904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142248 (or 142242 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 65985904 is about 8123.1708094807. The cubic root of 65985904 is about 404.0952296505.

The spelling of 65985904 in words is "sixty-five million, nine hundred eighty-five thousand, nine hundred four".