65673880 has 32 divisors (see below), whose sum is σ = 155545200. Its totient is φ = 24886656.

The previous prime is 65673863. The next prime is 65673887. The reversal of 65673880 is 8837656.

65673880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65673887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42447 + ... + 43966.

Almost surely, 2^65673880 is an apocalyptic number.

It is an amenable number.

65673880 is an abundant number, since it is smaller than the sum of its proper divisors (89871320).

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

65673880 is a wasteful number, since it uses less digits than its factorization.

65673880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86443 (or 86439 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 65673880 is about 8103.9422505346. The cubic root of 65673880 is about 403.4572819124.

The spelling of 65673880 in words is "sixty-five million, six hundred seventy-three thousand, eight hundred eighty".