66441433 has 4 divisors (see below), whose sum is σ = 66458548. Its totient is φ = 66424320.

The previous prime is 66441413. The next prime is 66441469. The reversal of 66441433 is 33414466.

It is a happy number.

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 944784 + 65496649 = 972^2 + 8093^2 .

It is a cyclic number.

It is not a de Polignac number, because 66441433 - 2⁹ = 66440921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66441395 and 66441404.

It is not an unprimeable number, because it can be changed into a prime (66441413) 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, 373 + ... + 11533.

It is an arithmetic number, because the mean of its divisors is an integer number (16614637).

Almost surely, 2^66441433 is an apocalyptic number.

It is an amenable number.

66441433 is a deficient number, since it is larger than the sum of its proper divisors (17115).

66441433 is a wasteful number, since it uses less digits than its factorization.

66441433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17114.

The product of its digits is 20736, while the sum is 31.

The square root of 66441433 is about 8151.1614509835. The cubic root of 66441433 is about 405.0229789329.

Adding to 66441433 its reverse (33414466), we get a palindrome (99855899).

The spelling of 66441433 in words is "sixty-six million, four hundred forty-one thousand, four hundred thirty-three".