66322389 has 32 divisors (see below), whose sum is σ = 109921536. Its totient is φ = 34698240.

The previous prime is 66322381. The next prime is 66322397. The reversal of 66322389 is 98322366.

It is an interprime number because it is at equal distance from previous prime (66322381) and next prime (66322397).

It is not a de Polignac number, because 66322389 - 2³ = 66322381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66322381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10699 + ... + 15719.

It is an arithmetic number, because the mean of its divisors is an integer number (3435048).

Almost surely, 2^66322389 is an apocalyptic number.

It is an amenable number.

66322389 is a deficient number, since it is larger than the sum of its proper divisors (43599147).

66322389 is a wasteful number, since it uses less digits than its factorization.

66322389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5085.

The product of its digits is 93312, while the sum is 39.

The square root of 66322389 is about 8143.8559049138. The cubic root of 66322389 is about 404.7809392991.

The spelling of 66322389 in words is "sixty-six million, three hundred twenty-two thousand, three hundred eighty-nine".