166272991112 has 12 divisors (see below), whose sum is σ = 311764020855. Its totient is φ = 83135918888.

The previous prime is 166272991103. The next prime is 166272991141. The reversal of 166272991112 is 211199272661.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 83136495556 + 83136495556 = 288334^2 + 288334^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=288334.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1081253 + ... + 1225419.

Almost surely, 2^166272991112 is an apocalyptic number.

It is an amenable number.

166272991112 is a deficient number, since it is larger than the sum of its proper divisors (145491029743).

166272991112 is an frugal number, since it uses more digits than its factorization.

166272991112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288340 (or 144169 counting only the distinct ones).

The product of its digits is 163296, while the sum is 47.

The spelling of 166272991112 in words is "one hundred sixty-six billion, two hundred seventy-two million, nine hundred ninety-one thousand, one hundred twelve".