2131666166812 has 96 divisors (see below), whose sum is σ = 4880779706880. Its totient is φ = 791002195200.

The previous prime is 2131666166767. The next prime is 2131666166821. The reversal of 2131666166812 is 2186616661312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 827338 + ... + 2224369.

It is an arithmetic number, because the mean of its divisors is an integer number (50841455280).

Almost surely, 2^{2131666166812} is an apocalyptic number.

It is an amenable number.

2131666166812 is an abundant number, since it is smaller than the sum of its proper divisors (2749113540068).

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

2131666166812 is a wasteful number, since it uses less digits than its factorization.

2131666166812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051851 (or 3051849 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

The spelling of 2131666166812 in words is "two trillion, one hundred thirty-one billion, six hundred sixty-six million, one hundred sixty-six thousand, eight hundred twelve".