66504673 has 8 divisors (see below), whose sum is σ = 67430880. Its totient is φ = 65584320.

The previous prime is 66504667. The next prime is 66504677. The reversal of 66504673 is 37640566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66504673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66504677) 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 7 ways as a sum of consecutive naturals, for example, 24498 + ... + 27076.

It is an arithmetic number, because the mean of its divisors is an integer number (8428860).

Almost surely, 2^66504673 is an apocalyptic number.

66504673 is the 5158-th heptagonal number.

It is an amenable number.

66504673 is a deficient number, since it is larger than the sum of its proper divisors (926207).

66504673 is a wasteful number, since it uses less digits than its factorization.

66504673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 66504673 is about 8155.0397301301. The cubic root of 66504673 is about 405.1514405963.

The spelling of 66504673 in words is "sixty-six million, five hundred four thousand, six hundred seventy-three".