1866684709848 has 128 divisors (see below), whose sum is σ = 5715684357120. Its totient is φ = 496361986560.

The previous prime is 1866684709817. The next prime is 1866684709867. The reversal of 1866684709848 is 8489074866681.

It is a self number, because there is not a number n which added to its sum of digits gives 1866684709848.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6385363 + ... + 6671298.

It is an arithmetic number, because the mean of its divisors is an integer number (44653784040).

Almost surely, 2^{1866684709848} is an apocalyptic number.

It is an amenable number.

1866684709848 is an abundant number, since it is smaller than the sum of its proper divisors (3848999647272).

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

1866684709848 is a wasteful number, since it uses less digits than its factorization.

1866684709848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13056737 (or 13056733 counting only the distinct ones).

The product of its (nonzero) digits is 891813888, while the sum is 75.

The spelling of 1866684709848 in words is "one trillion, eight hundred sixty-six billion, six hundred eighty-four million, seven hundred nine thousand, eight hundred forty-eight".