1866350134871 has 8 divisors (see below), whose sum is σ = 1875064320624. Its totient is φ = 1857643966080.

The previous prime is 1866350134843. The next prime is 1866350134879. The reversal of 1866350134871 is 1784310536681.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1866350134871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866350134879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1537301 + ... + 2469006.

It is an arithmetic number, because the mean of its divisors is an integer number (234383040078).

Almost surely, 2^{1866350134871} is an apocalyptic number.

1866350134871 is a deficient number, since it is larger than the sum of its proper divisors (8714185753).

1866350134871 is a wasteful number, since it uses less digits than its factorization.

1866350134871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008481.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 1866350134871 in words is "one trillion, eight hundred sixty-six billion, three hundred fifty million, one hundred thirty-four thousand, eight hundred seventy-one".