66747274 has 16 divisors (see below), whose sum is σ = 109348416. Its totient is φ = 30304800.

The previous prime is 66747271. The next prime is 66747293. The reversal of 66747274 is 47274766.

It is a self number, because there is not a number n which added to its sum of digits gives 66747274.

It is not an unprimeable number, because it can be changed into a prime (66747271) 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 7 ways as a sum of consecutive naturals, for example, 35539 + ... + 37369.

It is an arithmetic number, because the mean of its divisors is an integer number (6834276).

Almost surely, 2^66747274 is an apocalyptic number.

66747274 is a deficient number, since it is larger than the sum of its proper divisors (42601142).

66747274 is a wasteful number, since it uses less digits than its factorization.

66747274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501.

The product of its digits is 395136, while the sum is 43.

The square root of 66747274 is about 8169.9004889901. The cubic root of 66747274 is about 405.6434905780.

The spelling of 66747274 in words is "sixty-six million, seven hundred forty-seven thousand, two hundred seventy-four".