66072847 has 8 divisors (see below), whose sum is σ = 66580976. Its totient is φ = 65567232.

The previous prime is 66072841. The next prime is 66072869. The reversal of 66072847 is 74827066.

66072847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 66072847 - 2⁷ = 66072719 is a prime.

It is a super-2 number, since 2×66072847² = 8731242221370818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66072841) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 114223 + ... + 114799.

It is an arithmetic number, because the mean of its divisors is an integer number (8322622).

Almost surely, 2^66072847 is an apocalyptic number.

66072847 is a deficient number, since it is larger than the sum of its proper divisors (508129).

66072847 is a wasteful number, since it uses less digits than its factorization.

66072847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 66072847 is about 8128.5205911039. The cubic root of 66072847 is about 404.2726303284.

The spelling of 66072847 in words is "sixty-six million, seventy-two thousand, eight hundred forty-seven".