66084673 has 4 divisors (see below), whose sum is σ = 66293460. Its totient is φ = 65875888.

The previous prime is 66084671. The next prime is 66084677. The reversal of 66084673 is 37648066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37648066 = 2 ⋅18824033.

It can be written as a sum of positive squares in 2 ways, for example, as 35426304 + 30658369 = 5952^2 + 5537^2 .

It is a cyclic number.

It is not a de Polignac number, because 66084673 - 2¹ = 66084671 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66084671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103918 + ... + 104551.

It is an arithmetic number, because the mean of its divisors is an integer number (16573365).

Almost surely, 2^66084673 is an apocalyptic number.

It is an amenable number.

66084673 is a deficient number, since it is larger than the sum of its proper divisors (208787).

66084673 is a wasteful number, since it uses less digits than its factorization.

66084673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208786.

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

The square root of 66084673 is about 8129.2479972012. The cubic root of 66084673 is about 404.2967483695.

The spelling of 66084673 in words is "sixty-six million, eighty-four thousand, six hundred seventy-three".