166208730 has 32 divisors (see below), whose sum is σ = 400330944. Its totient is φ = 44163456.

The previous prime is 166208729. The next prime is 166208797. The reversal of 166208730 is 37802661.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166208691 and 166208700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1299 + ... + 18278.

It is an arithmetic number, because the mean of its divisors is an integer number (12510342).

Almost surely, 2^166208730 is an apocalyptic number.

166208730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166208730 is an abundant number, since it is smaller than the sum of its proper divisors (234122214).

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

166208730 is a wasteful number, since it uses less digits than its factorization.

166208730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19870.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 166208730 is about 12892.1964769391. The cubic root of 166208730 is about 549.8167213012.

The spelling of 166208730 in words is "one hundred sixty-six million, two hundred eight thousand, seven hundred thirty".