66108474 has 20 divisors (see below), whose sum is σ = 148132314. Its totient is φ = 22036104.

The previous prime is 66108473. The next prime is 66108491. The reversal of 66108474 is 47480166.

It can be written as a sum of positive squares in only one way, i.e., 64883025 + 1225449 = 8055^2 + 1107^2 .

It is not an unprimeable number, because it can be changed into a prime (66108473) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 203877 + ... + 204200.

Almost surely, 2^66108474 is an apocalyptic number.

66108474 is an abundant number, since it is smaller than the sum of its proper divisors (82023840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66108474 is a wasteful number, since it uses less digits than its factorization.

66108474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408091 (or 408082 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 66108474 is about 8130.7117769602. The cubic root of 66108474 is about 404.3452796021.

The spelling of 66108474 in words is "sixty-six million, one hundred eight thousand, four hundred seventy-four".