660242144 has 12 divisors (see below), whose sum is σ = 1299851784. Its totient is φ = 330121056.

The previous prime is 660242137. The next prime is 660242221. The reversal of 660242144 is 441242066.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 10316252 + ... + 10316315.

It is an arithmetic number, because the mean of its divisors is an integer number (108320982).

Almost surely, 2^660242144 is an apocalyptic number.

It is an amenable number.

660242144 is a deficient number, since it is larger than the sum of its proper divisors (639609640).

660242144 is a wasteful number, since it uses less digits than its factorization.

660242144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20632577 (or 20632569 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 660242144 is about 25695.1774463614. The cubic root of 660242144 is about 870.7652332686.

The spelling of 660242144 in words is "six hundred sixty million, two hundred forty-two thousand, one hundred forty-four".