66433541 has 4 divisors (see below), whose sum is σ = 66622092. Its totient is φ = 66244992.

The previous prime is 66433531. The next prime is 66433547. The reversal of 66433541 is 14533466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9431041 + 57002500 = 3071^2 + 7550^2 .

It is a cyclic number.

It is not a de Polignac number, because 66433541 - 2¹⁰ = 66432517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 66433498 and 66433507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66433547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93746 + ... + 94451.

It is an arithmetic number, because the mean of its divisors is an integer number (16655523).

Almost surely, 2^66433541 is an apocalyptic number.

It is an amenable number.

66433541 is a deficient number, since it is larger than the sum of its proper divisors (188551).

66433541 is a wasteful number, since it uses less digits than its factorization.

66433541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188550.

The product of its digits is 25920, while the sum is 32.

The square root of 66433541 is about 8150.6773338171. The cubic root of 66433541 is about 405.0069419122.

The spelling of 66433541 in words is "sixty-six million, four hundred thirty-three thousand, five hundred forty-one".