66873684 has 48 divisors (see below), whose sum is σ = 158699520. Its totient is φ = 21915360.

The previous prime is 66873683. The next prime is 66873691. The reversal of 66873684 is 48637866.

It is a happy number.

It is a super-2 number, since 2×66873684² = 8944179223463712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66873683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350029 + ... + 350219.

It is an arithmetic number, because the mean of its divisors is an integer number (3306240).

Almost surely, 2^66873684 is an apocalyptic number.

It is an amenable number.

66873684 is an abundant number, since it is smaller than the sum of its proper divisors (91825836).

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

66873684 is a wasteful number, since it uses less digits than its factorization.

66873684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 538 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 66873684 is about 8177.6331539144. The cubic root of 66873684 is about 405.8994064322.

The spelling of 66873684 in words is "sixty-six million, eight hundred seventy-three thousand, six hundred eighty-four".