66634976 has 24 divisors (see below), whose sum is σ = 138093480. Its totient is φ = 31563648.

The previous prime is 66634961. The next prime is 66635017. The reversal of 66634976 is 67943666.

66634976 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 66634976.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 54191 + ... + 55406.

It is an arithmetic number, because the mean of its divisors is an integer number (5753895).

Almost surely, 2^66634976 is an apocalyptic number.

It is an amenable number.

66634976 is an abundant number, since it is smaller than the sum of its proper divisors (71458504).

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

66634976 is a wasteful number, since it uses less digits than its factorization.

66634976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109626 (or 109618 counting only the distinct ones).

The product of its digits is 979776, while the sum is 47.

The square root of 66634976 is about 8163.0249295221. The cubic root of 66634976 is about 405.4158731763.

The spelling of 66634976 in words is "sixty-six million, six hundred thirty-four thousand, nine hundred seventy-six".