66481774 has 8 divisors (see below), whose sum is σ = 100001520. Its totient is φ = 33147936.

The previous prime is 66481759. The next prime is 66481813. The reversal of 66481774 is 47718466.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66481774.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45579 + ... + 47014.

It is an arithmetic number, because the mean of its divisors is an integer number (12500190).

Almost surely, 2^66481774 is an apocalyptic number.

66481774 is a deficient number, since it is larger than the sum of its proper divisors (33519746).

66481774 is a wasteful number, since it uses less digits than its factorization.

66481774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92954.

The product of its digits is 225792, while the sum is 43.

The square root of 66481774 is about 8153.6356308091. The cubic root of 66481774 is about 405.1049344514.

The spelling of 66481774 in words is "sixty-six million, four hundred eighty-one thousand, seven hundred seventy-four".