181666050 has 48 divisors (see below), whose sum is σ = 453825120. Its totient is φ = 48090240.

The previous prime is 181666031. The next prime is 181666081. The reversal of 181666050 is 50666181.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16494 + ... + 25206.

It is an arithmetic number, because the mean of its divisors is an integer number (9454690).

Almost surely, 2^181666050 is an apocalyptic number.

181666050 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 181666050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226912560).

181666050 is an abundant number, since it is smaller than the sum of its proper divisors (272159070).

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

181666050 is a wasteful number, since it uses less digits than its factorization.

181666050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8867 (or 8862 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 181666050 is about 13478.3548699387. The cubic root of 181666050 is about 566.3582847262.

The spelling of 181666050 in words is "one hundred eighty-one million, six hundred sixty-six thousand, fifty".