1016866311985 has 8 divisors (see below), whose sum is σ = 1221069113856. Its totient is φ = 812940023280.

The previous prime is 1016866311973. The next prime is 1016866311997. The reversal of 1016866311985 is 5891136686101.

It is an interprime number because it is at equal distance from previous prime (1016866311973) and next prime (1016866311997).

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

It is not a de Polignac number, because 1016866311985 - 2¹¹ = 1016866309937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69120199 + ... + 69134908.

It is an arithmetic number, because the mean of its divisors is an integer number (152633639232).

Almost surely, 2^{1016866311985} is an apocalyptic number.

It is an amenable number.

1016866311985 is a deficient number, since it is larger than the sum of its proper divisors (204202801871).

1016866311985 is a wasteful number, since it uses less digits than its factorization.

1016866311985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138256583.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 1016866311985 in words is "one trillion, sixteen billion, eight hundred sixty-six million, three hundred eleven thousand, nine hundred eighty-five".