1166857307812 has 12 divisors (see below), whose sum is σ = 2333714615680. Its totient is φ = 500081703336.

The previous prime is 1166857307789. The next prime is 1166857307879. The reversal of 1166857307812 is 2187037586611.

1166857307812 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20836737612 + ... + 20836737667.

Almost surely, 2^{1166857307812} is an apocalyptic number.

It is an amenable number.

1166857307812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1166857307812 is a wasteful number, since it uses less digits than its factorization.

1166857307812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41673475290 (or 41673475288 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 1166857307812 in words is "one trillion, one hundred sixty-six billion, eight hundred fifty-seven million, three hundred seven thousand, eight hundred twelve".