66473785 has 16 divisors (see below), whose sum is σ = 91316736. Its totient is φ = 45505728.

The previous prime is 66473779. The next prime is 66473807. The reversal of 66473785 is 58737466.

It is a cyclic number.

It is not a de Polignac number, because 66473785 - 2³ = 66473777 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 26704 + ... + 29086.

It is an arithmetic number, because the mean of its divisors is an integer number (5707296).

Almost surely, 2^66473785 is an apocalyptic number.

It is an amenable number.

66473785 is a deficient number, since it is larger than the sum of its proper divisors (24842951).

66473785 is a wasteful number, since it uses less digits than its factorization.

66473785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192.

The product of its digits is 846720, while the sum is 46.

The square root of 66473785 is about 8153.1457119323. The cubic root of 66473785 is about 405.0887068812.

It can be divided in two parts, 66 and 473785, that added together give a triangular number (473851 = T₉₇₃).

The spelling of 66473785 in words is "sixty-six million, four hundred seventy-three thousand, seven hundred eighty-five".