166181268 has 48 divisors (see below), whose sum is σ = 423783360. Its totient is φ = 50265600.

The previous prime is 166181221. The next prime is 166181363. The reversal of 166181268 is 862181661.

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, 115578 + ... + 117006.

It is an arithmetic number, because the mean of its divisors is an integer number (8828820).

Almost surely, 2^166181268 is an apocalyptic number.

It is an amenable number.

166181268 is an abundant number, since it is smaller than the sum of its proper divisors (257602092).

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

166181268 is a wasteful number, since it uses less digits than its factorization.

166181268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328 (or 2326 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 166181268 is about 12891.1313700544. The cubic root of 166181268 is about 549.7864382981.

The spelling of 166181268 in words is "one hundred sixty-six million, one hundred eighty-one thousand, two hundred sixty-eight".