660286417 has 6 divisors (see below), whose sum is σ = 768088338. Its totient is φ = 565959744.

The previous prime is 660286411. The next prime is 660286421. The reversal of 660286417 is 714682066.

It can be written as a sum of positive squares in only one way, i.e., 537497856 + 122788561 = 23184^2 + 11081^2 .

It is a de Polignac number, because none of the positive numbers 2^k-660286417 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 660286417.

It is not an unprimeable number, because it can be changed into a prime (660286411) 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 5 ways as a sum of consecutive naturals, for example, 6737568 + ... + 6737665.

It is an arithmetic number, because the mean of its divisors is an integer number (128014723).

Almost surely, 2^660286417 is an apocalyptic number.

It is an amenable number.

660286417 is a deficient number, since it is larger than the sum of its proper divisors (107801921).

660286417 is a wasteful number, since it uses less digits than its factorization.

660286417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13475247 (or 13475240 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 660286417 is about 25696.0389359917. The cubic root of 660286417 is about 870.7846960914.

The spelling of 660286417 in words is "six hundred sixty million, two hundred eighty-six thousand, four hundred seventeen".