66473894 has 8 divisors (see below), whose sum is σ = 104958840. Its totient is φ = 31487616.

The previous prime is 66473881. The next prime is 66473899. The reversal of 66473894 is 49837466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66473899) 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 3 ways as a sum of consecutive naturals, for example, 874619 + ... + 874694.

It is an arithmetic number, because the mean of its divisors is an integer number (13119855).

Almost surely, 2^66473894 is an apocalyptic number.

66473894 is a deficient number, since it is larger than the sum of its proper divisors (38484946).

66473894 is a wasteful number, since it uses less digits than its factorization.

66473894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749334.

The product of its digits is 870912, while the sum is 47.

The square root of 66473894 is about 8153.1523964660. The cubic root of 66473894 is about 405.0889282950.

The spelling of 66473894 in words is "sixty-six million, four hundred seventy-three thousand, eight hundred ninety-four".