66500533 has 8 divisors (see below), whose sum is σ = 73362240. Its totient is φ = 59774880.

The previous prime is 66500503. The next prime is 66500543. The reversal of 66500533 is 33500566.

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

It is not a de Polignac number, because 66500533 - 2⁵ = 66500501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66500503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32985 + ... + 34942.

It is an arithmetic number, because the mean of its divisors is an integer number (9170280).

Almost surely, 2^66500533 is an apocalyptic number.

It is an amenable number.

66500533 is a deficient number, since it is larger than the sum of its proper divisors (6861707).

66500533 is a wasteful number, since it uses less digits than its factorization.

66500533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68027.

The product of its (nonzero) digits is 8100, while the sum is 28.

The square root of 66500533 is about 8154.7858954114. The cubic root of 66500533 is about 405.1430333586.

The spelling of 66500533 in words is "sixty-six million, five hundred thousand, five hundred thirty-three".