166344857 has 12 divisors (see below), whose sum is σ = 193903056. Its totient is φ = 142286760.

The previous prime is 166344839. The next prime is 166344869. The reversal of 166344857 is 758443661.

166344857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-166344857 is a prime.

It is a super-3 number, since 3×166344857³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166344817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22382 + ... + 28872.

It is an arithmetic number, because the mean of its divisors is an integer number (16158588).

Almost surely, 2^166344857 is an apocalyptic number.

It is an amenable number.

166344857 is a deficient number, since it is larger than the sum of its proper divisors (27558199).

166344857 is an equidigital number, since it uses as much as digits as its factorization.

166344857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7028 (or 7021 counting only the distinct ones).

The product of its digits is 483840, while the sum is 44.

The square root of 166344857 is about 12897.4748303689. The cubic root of 166344857 is about 549.9667825669.

The spelling of 166344857 in words is "one hundred sixty-six million, three hundred forty-four thousand, eight hundred fifty-seven".