66033291 has 8 divisors (see below), whose sum is σ = 88119360. Its totient is φ = 43984712.

The previous prime is 66033281. The next prime is 66033307. The reversal of 66033291 is 19233066.

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 66033291 - 2⁵ = 66033259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66033211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4965 + ... + 12518.

It is an arithmetic number, because the mean of its divisors is an integer number (11014920).

Almost surely, 2^66033291 is an apocalyptic number.

66033291 is a deficient number, since it is larger than the sum of its proper divisors (22086069).

66033291 is a wasteful number, since it uses less digits than its factorization.

66033291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18745.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 66033291 is about 8126.0870657408. The cubic root of 66033291 is about 404.1919385811.

The spelling of 66033291 in words is "sixty-six million, thirty-three thousand, two hundred ninety-one".