659663961 has 8 divisors (see below), whose sum is σ = 959511264. Its totient is φ = 399796320.

The previous prime is 659663947. The next prime is 659663969. The reversal of 659663961 is 169366956.

659663961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 659663961 - 2⁷ = 659663833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (659663969) 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, 9994876 + ... + 9994941.

It is an arithmetic number, because the mean of its divisors is an integer number (119938908).

Almost surely, 2^659663961 is an apocalyptic number.

It is an amenable number.

659663961 is a deficient number, since it is larger than the sum of its proper divisors (299847303).

659663961 is a wasteful number, since it uses less digits than its factorization.

659663961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19989831.

The product of its digits is 1574640, while the sum is 51.

The square root of 659663961 is about 25683.9241744715. The cubic root of 659663961 is about 870.5109787279.

The spelling of 659663961 in words is "six hundred fifty-nine million, six hundred sixty-three thousand, nine hundred sixty-one".