166431306 has 8 divisors (see below), whose sum is σ = 332862624. Its totient is φ = 55477100.

The previous prime is 166431301. The next prime is 166431311. The reversal of 166431306 is 603134661.

166431306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166431301) and next prime (166431311).

It is a sphenic number, since it is the product of 3 distinct primes.

166431306 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (166431301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13869270 + ... + 13869281.

It is an arithmetic number, because the mean of its divisors is an integer number (41607828).

Almost surely, 2^166431306 is an apocalyptic number.

166431306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166431306 is a wasteful number, since it uses less digits than its factorization.

166431306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27738556.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 166431306 is about 12900.8257875223. The cubic root of 166431306 is about 550.0620381811.

Adding to 166431306 its reverse (603134661), we get a palindrome (769565967).

The spelling of 166431306 in words is "one hundred sixty-six million, four hundred thirty-one thousand, three hundred six".