66532273 has 16 divisors (see below), whose sum is σ = 69884416. Its totient is φ = 63296640.

The previous prime is 66532247. The next prime is 66532289. The reversal of 66532273 is 37223566.

It is a cyclic number.

It is not a de Polignac number, because 66532273 - 2⁵ = 66532241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66538273) 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 15 ways as a sum of consecutive naturals, for example, 298240 + ... + 298462.

It is an arithmetic number, because the mean of its divisors is an integer number (4367776).

Almost surely, 2^66532273 is an apocalyptic number.

It is an amenable number.

66532273 is a deficient number, since it is larger than the sum of its proper divisors (3352143).

66532273 is a wasteful number, since it uses less digits than its factorization.

66532273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424.

The product of its digits is 45360, while the sum is 34.

The square root of 66532273 is about 8156.7317597185. The cubic root of 66532273 is about 405.2074799326.

The spelling of 66532273 in words is "sixty-six million, five hundred thirty-two thousand, two hundred seventy-three".