1866921067488 has 96 divisors (see below), whose sum is σ = 5204249568000. Its totient is φ = 584336664576.

The previous prime is 1866921067379. The next prime is 1866921067537. The reversal of 1866921067488 is 8847601296681.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4322788 + ... + 4735011.

It is an arithmetic number, because the mean of its divisors is an integer number (54210933000).

Almost surely, 2^{1866921067488} is an apocalyptic number.

It is an amenable number.

1866921067488 is an abundant number, since it is smaller than the sum of its proper divisors (3337328500512).

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

1866921067488 is a wasteful number, since it uses less digits than its factorization.

1866921067488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9057944 (or 9057936 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 66.

The spelling of 1866921067488 in words is "one trillion, eight hundred sixty-six billion, nine hundred twenty-one million, sixty-seven thousand, four hundred eighty-eight".