660039659 has 8 divisors (see below), whose sum is σ = 674707968. Its totient is φ = 645397480.

The previous prime is 660039629. The next prime is 660039683. The reversal of 660039659 is 956930066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660039659 - 2⁸ = 660039403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660039629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49874 + ... + 61704.

It is an arithmetic number, because the mean of its divisors is an integer number (84338496).

Almost surely, 2^660039659 is an apocalyptic number.

660039659 is a deficient number, since it is larger than the sum of its proper divisors (14668309).

660039659 is a wasteful number, since it uses less digits than its factorization.

660039659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13065.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 660039659 is about 25691.2370079761. The cubic root of 660039659 is about 870.6762078873.

The spelling of 660039659 in words is "six hundred sixty million, thirty-nine thousand, six hundred fifty-nine".