66672847 has 8 divisors (see below), whose sum is σ = 70503552. Its totient is φ = 62947200.

The previous prime is 66672803. The next prime is 66672889. The reversal of 66672847 is 74827666.

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-66672847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66672797 and 66672806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66672547) 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, 24958 + ... + 27499.

It is an arithmetic number, because the mean of its divisors is an integer number (8812944).

Almost surely, 2^66672847 is an apocalyptic number.

66672847 is a deficient number, since it is larger than the sum of its proper divisors (3830705).

66672847 is a wasteful number, since it uses less digits than its factorization.

66672847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52529.

The product of its digits is 677376, while the sum is 46.

The square root of 66672847 is about 8165.3442670839. The cubic root of 66672847 is about 405.4926626630.

The spelling of 66672847 in words is "sixty-six million, six hundred seventy-two thousand, eight hundred forty-seven".