166400130 has 64 divisors (see below), whose sum is σ = 433496448. Its totient is φ = 40634880.

The previous prime is 166400123. The next prime is 166400141. The reversal of 166400130 is 31004661.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166400097 and 166400106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49462 + ... + 52718.

It is an arithmetic number, because the mean of its divisors is an integer number (6773382).

Almost surely, 2^166400130 is an apocalyptic number.

166400130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166400130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216748224).

166400130 is an abundant number, since it is smaller than the sum of its proper divisors (267096318).

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

166400130 is a wasteful number, since it uses less digits than its factorization.

166400130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3411.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 166400130 is about 12899.6174361878. The cubic root of 166400130 is about 550.0276900660.

Adding to 166400130 its reverse (31004661), we get a palindrome (197404791).

The spelling of 166400130 in words is "one hundred sixty-six million, four hundred thousand, one hundred thirty".