138810166 has 16 divisors (see below), whose sum is σ = 227325888. Its totient is φ = 63045000.

The previous prime is 138810163. The next prime is 138810209. The reversal of 138810166 is 661018831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138810163) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 48121 + ... + 50923.

It is an arithmetic number, because the mean of its divisors is an integer number (14207868).

Almost surely, 2^138810166 is an apocalyptic number.

138810166 is a deficient number, since it is larger than the sum of its proper divisors (88515722).

138810166 is a wasteful number, since it uses less digits than its factorization.

138810166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5067.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 138810166 is about 11781.7726170556. The cubic root of 138810166 is about 517.7742217059.

Adding to 138810166 its reverse (661018831), we get a palindrome (799828997).

The spelling of 138810166 in words is "one hundred thirty-eight million, eight hundred ten thousand, one hundred sixty-six".