660335642 has 16 divisors (see below), whose sum is σ = 1005944832. Its totient is φ = 325034640.

The previous prime is 660335623. The next prime is 660335647. The reversal of 660335642 is 246533066.

It is not an unprimeable number, because it can be changed into a prime (660335647) 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, 104423 + ... + 110565.

It is an arithmetic number, because the mean of its divisors is an integer number (62871552).

Almost surely, 2^660335642 is an apocalyptic number.

660335642 is a deficient number, since it is larger than the sum of its proper divisors (345609190).

660335642 is a wasteful number, since it uses less digits than its factorization.

660335642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6973.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 660335642 is about 25696.9967505932. The cubic root of 660335642 is about 870.8063348380.

The spelling of 660335642 in words is "six hundred sixty million, three hundred thirty-five thousand, six hundred forty-two".