66766684 has 48 divisors (see below), whose sum is σ = 134507520. Its totient is φ = 28788480.

The previous prime is 66766681. The next prime is 66766691. The reversal of 66766684 is 48666766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66766681) 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 15 ways as a sum of consecutive naturals, for example, 39219 + ... + 40885.

It is an arithmetic number, because the mean of its divisors is an integer number (2802240).

Almost surely, 2^66766684 is an apocalyptic number.

It is an amenable number.

66766684 is an abundant number, since it is smaller than the sum of its proper divisors (67740836).

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

66766684 is a wasteful number, since it uses less digits than its factorization.

66766684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738 (or 1736 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 49.

The square root of 66766684 is about 8171.0882996086. The cubic root of 66766684 is about 405.6828069256.

The spelling of 66766684 in words is "sixty-six million, seven hundred sixty-six thousand, six hundred eighty-four".