66322489 has 4 divisors (see below), whose sum is σ = 67006324. Its totient is φ = 65638656.

The previous prime is 66322481. The next prime is 66322493. The reversal of 66322489 is 98422366.

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 50979600 + 15342889 = 7140^2 + 3917^2 .

It is a cyclic number.

It is not a de Polignac number, because 66322489 - 2³ = 66322481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66322481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341772 + ... + 341965.

It is an arithmetic number, because the mean of its divisors is an integer number (16751581).

Almost surely, 2^66322489 is an apocalyptic number.

It is an amenable number.

66322489 is a deficient number, since it is larger than the sum of its proper divisors (683835).

66322489 is an equidigital number, since it uses as much as digits as its factorization.

66322489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683834.

The product of its digits is 124416, while the sum is 40.

The square root of 66322489 is about 8143.8620445093. The cubic root of 66322489 is about 404.7811427400.

The spelling of 66322489 in words is "sixty-six million, three hundred twenty-two thousand, four hundred eighty-nine".