66422398 has 24 divisors (see below), whose sum is σ = 117682416. Its totient is φ = 27542880.

The previous prime is 66422387. The next prime is 66422407. The reversal of 66422398 is 89322466.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66422398.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 10986 + ... + 15922.

It is an arithmetic number, because the mean of its divisors is an integer number (4903434).

Almost surely, 2^66422398 is an apocalyptic number.

66422398 is a deficient number, since it is larger than the sum of its proper divisors (51260018).

66422398 is a wasteful number, since it uses less digits than its factorization.

66422398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008 (or 4977 counting only the distinct ones).

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

The square root of 66422398 is about 8149.9937423289. The cubic root of 66422398 is about 404.9842965003.

The spelling of 66422398 in words is "sixty-six million, four hundred twenty-two thousand, three hundred ninety-eight".