166126338 has 24 divisors (see below), whose sum is σ = 411360768. Its totient is φ = 47464632.

The previous prime is 166126333. The next prime is 166126339. The reversal of 166126338 is 833621661.

166126338 is a `hidden beast` number, since 1 + 6 + 6 + 12 + 633 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (166126333) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 659106 + ... + 659357.

It is an arithmetic number, because the mean of its divisors is an integer number (17140032).

Almost surely, 2^166126338 is an apocalyptic number.

166126338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

166126338 is an abundant number, since it is smaller than the sum of its proper divisors (245234430).

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

166126338 is a wasteful number, since it uses less digits than its factorization.

166126338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318478 (or 1318475 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 166126338 is about 12889.0006594771. Note that the first 3 decimals coincide. The cubic root of 166126338 is about 549.7258556635.

Adding to 166126338 its reverse (833621661), we get a palindrome (999747999).

It can be divided in two parts, 166126 and 338, that added together give a square (166464 = 408²).

The spelling of 166126338 in words is "one hundred sixty-six million, one hundred twenty-six thousand, three hundred thirty-eight".