66550273 has 8 divisors (see below), whose sum is σ = 71066880. Its totient is φ = 62181840.

The previous prime is 66550243. The next prime is 66550303. The reversal of 66550273 is 37205566.

It is an interprime number because it is at equal distance from previous prime (66550243) and next prime (66550303).

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 66550273 - 2⁵ = 66550241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66550243) 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, 36115 + ... + 37912.

It is an arithmetic number, because the mean of its divisors is an integer number (8883360).

Almost surely, 2^66550273 is an apocalyptic number.

It is an amenable number.

66550273 is a deficient number, since it is larger than the sum of its proper divisors (4516607).

66550273 is a wasteful number, since it uses less digits than its factorization.

66550273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74087.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 66550273 is about 8157.8350682028. The cubic root of 66550273 is about 405.2440189767.

The spelling of 66550273 in words is "sixty-six million, five hundred fifty thousand, two hundred seventy-three".