660963959 has 8 divisors (see below), whose sum is σ = 665335440. Its totient is φ = 656603136.

The previous prime is 660963937. The next prime is 660963983. The reversal of 660963959 is 959369066.

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 660963959 - 2¹² = 660959863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660963959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660963559) 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, 149312 + ... + 153674.

It is an arithmetic number, because the mean of its divisors is an integer number (83166930).

Almost surely, 2^660963959 is an apocalyptic number.

660963959 is a deficient number, since it is larger than the sum of its proper divisors (4371481).

660963959 is a wasteful number, since it uses less digits than its factorization.

660963959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5329.

The product of its (nonzero) digits is 2361960, while the sum is 53.

The square root of 660963959 is about 25709.2193385953. The cubic root of 660963959 is about 871.0824413831.

The spelling of 660963959 in words is "six hundred sixty million, nine hundred sixty-three thousand, nine hundred fifty-nine".