287861126066 has 4 divisors (see below), whose sum is σ = 431791689102. Its totient is φ = 143930563032.

The previous prime is 287861126011. The next prime is 287861126071. The reversal of 287861126066 is 660621168782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660621168782 = 2 ⋅330310584391.

It can be written as a sum of positive squares in only one way, i.e., 246338505625 + 41522620441 = 496325^2 + 203771^2 .

It is a junction number, because it is equal to n+sod(n) for n = 287861125999 and 287861126017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71965281515 + ... + 71965281518.

Almost surely, 2^287861126066 is an apocalyptic number.

287861126066 is a deficient number, since it is larger than the sum of its proper divisors (143930563036).

287861126066 is a wasteful number, since it uses less digits than its factorization.

287861126066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143930563035.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 287861126066 in words is "two hundred eighty-seven billion, eight hundred sixty-one million, one hundred twenty-six thousand, sixty-six".