66086473 has 4 divisors (see below), whose sum is σ = 66152980. Its totient is φ = 66019968.

The previous prime is 66086441. The next prime is 66086479. The reversal of 66086473 is 37468066.

66086473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26245129 + 39841344 = 5123^2 + 6312^2 .

It is a cyclic number.

It is not a de Polignac number, because 66086473 - 2⁵ = 66086441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66086479) 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 3 ways as a sum of consecutive naturals, for example, 31740 + ... + 33757.

It is an arithmetic number, because the mean of its divisors is an integer number (16538245).

Almost surely, 2^66086473 is an apocalyptic number.

It is an amenable number.

66086473 is a deficient number, since it is larger than the sum of its proper divisors (66507).

66086473 is a wasteful number, since it uses less digits than its factorization.

66086473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66506.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 66086473 is about 8129.3587077949. The cubic root of 66086473 is about 404.3004190519.

The spelling of 66086473 in words is "sixty-six million, eighty-six thousand, four hundred seventy-three".