66465533 has 8 divisors (see below), whose sum is σ = 67039416. Its totient is φ = 65894400.

The previous prime is 66465527. The next prime is 66465547. The reversal of 66465533 is 33556466.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5968249 + 60497284 = 2443^2 + 7778^2 .

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 66465533 - 2²⁰ = 65416957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66465523) 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, 100223 + ... + 100883.

It is an arithmetic number, because the mean of its divisors is an integer number (8379927).

Almost surely, 2^66465533 is an apocalyptic number.

It is an amenable number.

66465533 is a deficient number, since it is larger than the sum of its proper divisors (573883).

66465533 is a wasteful number, since it uses less digits than its factorization.

66465533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375.

The product of its digits is 194400, while the sum is 38.

The square root of 66465533 is about 8152.6396338855. The cubic root of 66465533 is about 405.0719437299.

The spelling of 66465533 in words is "sixty-six million, four hundred sixty-five thousand, five hundred thirty-three".