66322390 has 8 divisors (see below), whose sum is σ = 119380320. Its totient is φ = 26528952.

The previous prime is 66322381. The next prime is 66322397. The reversal of 66322390 is 9322366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66322397) 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, 3316110 + ... + 3316129.

It is an arithmetic number, because the mean of its divisors is an integer number (14922540).

Almost surely, 2^66322390 is an apocalyptic number.

66322390 is a deficient number, since it is larger than the sum of its proper divisors (53057930).

66322390 is a wasteful number, since it uses less digits than its factorization.

66322390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6632246.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 66322390 is about 8143.8559663098. The cubic root of 66322390 is about 404.7809413335.

The spelling of 66322390 in words is "sixty-six million, three hundred twenty-two thousand, three hundred ninety".