660071149 has 16 divisors (see below), whose sum is σ = 685900800. Its totient is φ = 634817664.

The previous prime is 660071147. The next prime is 660071161. The reversal of 660071149 is 941170066.

It is a cyclic number.

It is not a de Polignac number, because 660071149 - 2¹ = 660071147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660071143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1444129 + ... + 1444585.

It is an arithmetic number, because the mean of its divisors is an integer number (42868800).

Almost surely, 2^660071149 is an apocalyptic number.

It is an amenable number.

660071149 is a deficient number, since it is larger than the sum of its proper divisors (25829651).

660071149 is a wasteful number, since it uses less digits than its factorization.

660071149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 660071149 is about 25691.8498555476. The cubic root of 660071149 is about 870.6900541047.

The spelling of 660071149 in words is "six hundred sixty million, seventy-one thousand, one hundred forty-nine".