166399130 has 16 divisors (see below), whose sum is σ = 299665440. Its totient is φ = 66526992.

The previous prime is 166399109. The next prime is 166399133. The reversal of 166399130 is 31993661.

166399130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166399133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36941 + ... + 41199.

It is an arithmetic number, because the mean of its divisors is an integer number (18729090).

Almost surely, 2^166399130 is an apocalyptic number.

166399130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166399130 is a deficient number, since it is larger than the sum of its proper divisors (133266310).

166399130 is a wasteful number, since it uses less digits than its factorization.

166399130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8173.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 166399130 is about 12899.5786752901. The cubic root of 166399130 is about 550.0265882463.

The spelling of 166399130 in words is "one hundred sixty-six million, three hundred ninety-nine thousand, one hundred thirty".