1866667488686 has 32 divisors (see below), whose sum is σ = 3759442219008. Its totient is φ = 671328966240.

The previous prime is 1866667488677. The next prime is 1866667488701. The reversal of 1866667488686 is 6868847666681.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1866667488686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466198670 + ... + 466202673.

It is an arithmetic number, because the mean of its divisors is an integer number (117482569344).

Almost surely, 2^{1866667488686} is an apocalyptic number.

1866667488686 is an abundant number, since it is smaller than the sum of its proper divisors (1892774730322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1866667488686 is a wasteful number, since it uses less digits than its factorization.

1866667488686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932401376.

The product of its digits is 5350883328, while the sum is 80.

The spelling of 1866667488686 in words is "one trillion, eight hundred sixty-six billion, six hundred sixty-seven million, four hundred eighty-eight thousand, six hundred eighty-six".