660135245 has 64 divisors (see below), whose sum is σ = 1052352000. Its totient is φ = 386196480.

The previous prime is 660135239. The next prime is 660135341. The reversal of 660135245 is 542531066.

It is not a de Polignac number, because 660135245 - 2⁶ = 660135181 is a prime.

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 in 63 ways as a sum of consecutive naturals, for example, 1891331 + ... + 1891679.

It is an arithmetic number, because the mean of its divisors is an integer number (16443000).

Almost surely, 2^660135245 is an apocalyptic number.

It is an amenable number.

660135245 is a deficient number, since it is larger than the sum of its proper divisors (392216755).

660135245 is a wasteful number, since it uses less digits than its factorization.

660135245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 660135245 is about 25693.0972247411. The cubic root of 660135245 is about 870.7182358866.

The spelling of 660135245 in words is "six hundred sixty million, one hundred thirty-five thousand, two hundred forty-five".