66320441 has 4 divisors (see below), whose sum is σ = 72349584. Its totient is φ = 60291300.

The previous prime is 66320413. The next prime is 66320459. The reversal of 66320441 is 14402366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66320441 - 2¹⁴ = 66304057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66320441.

It is not an unprimeable number, because it can be changed into a prime (66320341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3014555 + ... + 3014576.

It is an arithmetic number, because the mean of its divisors is an integer number (18087396).

Almost surely, 2^66320441 is an apocalyptic number.

It is an amenable number.

66320441 is a deficient number, since it is larger than the sum of its proper divisors (6029143).

66320441 is a wasteful number, since it uses less digits than its factorization.

66320441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6029142.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 66320441 is about 8143.7363046700. The cubic root of 66320441 is about 404.7769762282.

The spelling of 66320441 in words is "sixty-six million, three hundred twenty thousand, four hundred forty-one".