166681412 has 12 divisors (see below), whose sum is σ = 291996096. Its totient is φ = 83253960.

The previous prime is 166681409. The next prime is 166681457. The reversal of 166681412 is 214186661.

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, 17264 + ... + 25127.

It is an arithmetic number, because the mean of its divisors is an integer number (24333008).

Almost surely, 2^166681412 is an apocalyptic number.

It is an amenable number.

166681412 is a deficient number, since it is larger than the sum of its proper divisors (125314684).

166681412 is a wasteful number, since it uses less digits than its factorization.

166681412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43378 (or 43376 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 166681412 is about 12910.5155590317. The cubic root of 166681412 is about 550.3374370098.

The spelling of 166681412 in words is "one hundred sixty-six million, six hundred eighty-one thousand, four hundred twelve".