181066633 has 8 divisors (see below), whose sum is σ = 204338880. Its totient is φ = 158929680.

The previous prime is 181066573. The next prime is 181066651. The reversal of 181066633 is 336660181.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 181066633 - 2²⁵ = 147512201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181066733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283485 + ... + 284122.

It is an arithmetic number, because the mean of its divisors is an integer number (25542360).

Almost surely, 2^181066633 is an apocalyptic number.

It is an amenable number.

181066633 is a deficient number, since it is larger than the sum of its proper divisors (23272247).

181066633 is a wasteful number, since it uses less digits than its factorization.

181066633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567647.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 181066633 is about 13456.1002151441. The cubic root of 181066633 is about 565.7346883842.

The spelling of 181066633 in words is "one hundred eighty-one million, sixty-six thousand, six hundred thirty-three".