286661668889 has 8 divisors (see below), whose sum is σ = 289675254120. Its totient is φ = 283649273856.

The previous prime is 286661668859. The next prime is 286661668903. The reversal of 286661668889 is 988866166682.

It can be written as a sum of positive squares in 4 ways, for example, as 127169265664 + 159492403225 = 356608^2 + 399365^2 .

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 286661668889 - 2¹⁶ = 286661603353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (286661668829) 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, 190877 + ... + 780869.

It is an arithmetic number, because the mean of its divisors is an integer number (36209406765).

Almost surely, 2^286661668889 is an apocalyptic number.

It is an amenable number.

286661668889 is a deficient number, since it is larger than the sum of its proper divisors (3013585231).

286661668889 is an equidigital number, since it uses as much as digits as its factorization.

286661668889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595099.

The product of its digits is 573308928, while the sum is 74.

The spelling of 286661668889 in words is "two hundred eighty-six billion, six hundred sixty-one million, six hundred sixty-eight thousand, eight hundred eighty-nine".