66281074 has 4 divisors (see below), whose sum is σ = 99421614. Its totient is φ = 33140536.

The previous prime is 66281057. The next prime is 66281077. The reversal of 66281074 is 47018266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50623225 + 15657849 = 7115^2 + 3957^2 .

It is not an unprimeable number, because it can be changed into a prime (66281077) 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 as a sum of consecutive naturals, namely, 16570267 + ... + 16570270.

Almost surely, 2^66281074 is an apocalyptic number.

66281074 is a deficient number, since it is larger than the sum of its proper divisors (33140540).

66281074 is a wasteful number, since it uses less digits than its factorization.

66281074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33140539.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 66281074 is about 8141.3189349147. The cubic root of 66281074 is about 404.6968701606.

The spelling of 66281074 in words is "sixty-six million, two hundred eighty-one thousand, seventy-four".